Osman began his journey by forming a friendship with Yorgopolos and the Kayi tribe expanded its influence further during the reign of Osman Ghazi, but some problems will hinder Osman and he must solve it.

The appearance of Adbali and his daughter, Bamsi bid farewell to his son Ibars, while sedition began to appear in the horizon between the Kayi tribe and the castle after the killing of Yorgopolos and Sofia accused Osman of killing him.

Seeing Helen and Sofia running down the aisle, Kalanoz went after her, suspecting her murder partner, Sofia, of getting involved in other things. Osman captured Teokles and the front of Theebali was blocked by Akca Dervis, Pehlivan and Zulfikar Dervis. After the trio, Bala Hatun took Osman to Edebali. I wonder what Edebali will tell Osman. What kind of plan will Dundar and Batur plan to plan for Dundar, whose daughter was kidnapped, and Zohre, who saw Osman as responsible for these events? What's the big surprise waiting for Kalanoz, who's going after Sofia and Helen.

Bala Hatun is kidnapped. Osman is imprisoned in a tent with his hands chained. Learning about Bala Hatun's abduction and outraged Osman's actions surprise everyone.

Yannis succeeded in realizing his bloody plan, raiding the market by the lake and kidnapping Edebali's daughter.

Osman took Bala Hatun's healing from Yannis and exposed Yannis.

Batur, Dündar's son, rescues Osman for a reputation in the tribe after one of Salvador's men is tricked. Edebali declines Osman's proposal leaving him devastated and upset.

Sofia tasks her lover, Kalanoz, to kill Şeyh Edebali but is killed in this attempt by Osman. Bamsı, Osman's loyal companion, converts Salvador to Islam. Salvador's new name is Sıddık.

Osman steals all the tax gold that was being transported illegally to Alişar Bey, the Selçuk Sançak Bey, by the Mongols. Yannis, disguised as a clairvoyant, proves to Alişar that Osman stole the gold. Alişar becomes an enemy of Osman.

Balgay, a Mongol commander, captures Söğüt and kills many women and children. He offers Osman that he will give him the Sançak Beylik and some more land if he was to become loyal to him. Osman rejects Balgay's offer.

Osman, with many difficulties, manages to escape the town with his alps. Balgay meets Yannis and Sofia and they decide to ally against Osman. Balgay even raids the Kayı tribe and has Osman's entire family in hostage until he comes. Konur, one of Osman's alps, also uncovers the fact that one of Balgay's men, Kongar, is his long-lost brother.

Osman, who has met the Aksakals, arrives in the tribe and gives Balgay Genghis Han's dagger in order to leave him and his tribe alone. Osman tasks Salvador to spy for him in Kulucahisar Castle, however, the cunning Sofia still doesn't trust him too much. Meanwhile, the tribe council, mainly Dündar, decides to expel Osman for rebelling against the Mongols. Osman later recaptures Söğüt with his alps.

Dündar is given the Sançak Beylik, angering Alişar, and Osman takes back the dagger he gave to Balgay secretly through an operation at his camp, humiliating him in front of the Mongol leaders. Bala is wounded by some Mongols and now cannot produce a baby.

After he kidnaps Sofia, Osman tells Yannis that he can have his daughter back if he asked Balgay to come to his castle, in the way he would ambush him. The ambush is successful but Batur is killed by Alişar, who has the intention of making Dündar and Osman fight.

Alişar pins the blame on Osman resulting in Dündar attacking Osman during the ambush. In Dündar's attack, Alişar, who is hidden behind the trees, aims at killing Osman with his arrow but accidentally hits Dündar instead. Balgay escapes but Gündüz, Osman's elder brother, successfully becomes the new substitute Bey of the Kayı tribe.

After his meeting with the Aksakals, Osman saves Princess Adelfa, a Byzantine princess being forced to marry Geyhatu. After saving her, he takes her to his tribe and asks Bala and Selcan to take special care of her.

Zöhre, Dündar's devious wife who even had Gündüz kidnapped by Balgay earlier, plans to take Adelfa to Alişar in spite of Bala and Selcan through her adoptive daughter, Burçin.

Kongar reverts to Islam and becomes Göktug after a contract is shown to him that he was actually bought by Balgay from a slave-trader. Meanwhile, Osman is tasked by the Aksakals to save his uncle, Sungurtekin, who was spying for them in the Margarit Monks and his betrayal is now caught, Osman succeeds and embraces his thought-dead uncle.

Osman ambushes Dündar and Zöhre, who were taking their daughter, Aygül, to get her married to Alişar, he sought to show them that he didn't kill Batur. He trusts Aygül that she believed him that he didn't kill Batur, however, as she didn't trust him from the start, when she is let go, she tells Alişar everything and asks him to save her parents. Later, Aygül's parents are freed because of her betrayal.

Balgay captures Osman while Böke, the Mongol commander who informed the monks about Sungurtekin's betrayal, supposedly allies with Balgay to save his life, however, with the help of Göktug, disguised as Kongar, Osman escapes but is severely wounded by arrows.

Göktug continues to spy for Osman at Balgay's camp while Osman recovers with the help of Şeyh Edebali and sees a dream which results in Edebali allowing Osman to marry Bala.

Osman tasks Gündüz and Bala to invade Alişar's mansion where they are successful. Meanwhile, Osman captures Alişar when he is away and forces him to reveal to Dündar that he killed Batur. After seeing this, Dündar begs for forgiveness. Böke also dies in an ambush and Osman takes Alişar to the tribe and is ready to behead him only to be stopped by Geyhatu's commander, Subutay.

Osman ignores Subutay's threats and beheads Alişar. Sofia escapes the Emperor who sentenced Yannis and most of the Margarit Monks to death. Hazal[v], Dündar's first wife, arrives and kills Zöhre for poisoning Osman and Bala's wedding food, which was given to her indirectly through Sofia. Meanwhile, Balgay finds out that Göktug has been betraying him and gives him a potion that messes up his memory and changes him into Kongar again.

Aygül is currently mentally ill after she learnt the truth about Alişar. Sıddık's betrayal is caught by Sofia and thus he is martyred while Subutay allies with Balgay and Sofia to destroy the Kayı tribe in an attack. Osman, who is aware of the attack, prepares for it and therefore, Subutay's plans backfire.

Subutay is beheaded, however, Sofia escapes with the help of Balgay. Kongar becomes a Muslim again after remembering everything but bids farewell to Konur, who was accidentally killed by him when he was drunk with the potion. In an epic showdown, Balgay is supposedly killed by Osman along with the supposed death of Cerkutay by Göktug in the presence of Sofia and her 'dark knights', a special sort of knights, who keep on fighting till they die. However, Cerkutay manages to survive the attack.

The 'dark knights' injure Osman very badly and everyone believes he is dead, however, Osman is actually alive but he only tells Gündüz, Bala and Selcan. Taking advantage, Osman conquers Kulucahisar Castle and kills Sofia in the process. Aygül, who is mentally ill, attempts to kill Hazal because she killed her mother, however, the arrow accidentally kills Burçin instead.

Tekfur Alexis of İnegöl seeks revenge on the Kayı tribe for conquering Kulucahisar. He invades a caravan of the Kayı tribe, Osman, takes his revenge by defeating him in a battle. After the battle, the Emperor, concerned over the Turk threat on his empire, sends Aya Nikola to İnegöl Castle. Nikola kills Alexis for his failure and snatches the castle from him. Nikola also frees an old friend from prison, Flatyos. Ertuğrul also later returns towards the end after a year in Konya.

Nikola arrives in the nomad camp and claims he wants peace while Osman thinks he is about to meet his father but falls into an ambush set by Yavlak Arslan, Hazal Hatun's brother. Meanwhile, Osman's elder brother, Savcı, also returns from Crimea. Ertuğrul goes to meet Arslan Bey of the Çobanoğlu tribe and warns him not to become a traitor as he's dealt with them his whole life. Osman, who escapes Arslan's ambush, ambushes him and Geyhatu's son, Möngke's camp. However, Arslan and Möngke escape.

Arslan tasks Cerkutay, who is alive, to go to Geyhatu, who already hates him because of him being loyal to Balgay, and tell him that Osman captured Möngke. Geyhatu, who is in Konya planning to kill his brother, Argun, is angered over this and allows Cerkutay to live if he is loyal to him. Meanwhile, Söğüt perishes due to the disease spread by Flatyos on the orders of Nikola followed by an explosion done by the same people.

The relations between Savcı and Osman become tenser, Osman is angered when Ertuğrul sends Savcı to explain to Geyhatu that Osman didn't kidnap Möngke. When Savcı arrives at Geyhatu's camp, he is given only a few days to find Möngke otherwise his tribe will be destroyed. After Savcı tricks one of Cerkutay's men into telling him Möngke's location, he falls into Möngke and Arslan's trap and is captured. Möngke seeks to kill his father to become the Viceroy and then the Great Han while pinning the blame on Osman.

The time period given by Geyhatu ends and Geyhatu arrives in Osman's tribe. Osman saves Savcı and he returns to the tribe with the captured Möngke. Ertuğrul continues to stay on his death bed.

Möngke's treachery is proven after he is forced to reveal the truth, however, he doesn't manage to say the truth about Arslan thus Arslan survives and Möngke is killed by Geyhatu. In the meantime, Aya Nikola and Flatyos successfully capture Kulucahisar Castle.

Osman is alerted that a distant Cuman Turk tribe has been invaded by the Emperor and the Bey's daughter, Targun, is being taken captive. Osman rescues Targun and takes her to the tribe. However, Targun is betraying Osman, she spies for Aya Nikola to save her father, İnal Bey, who is in Aya Nikola's captive. Hazal also teases Bala that Targun was brought by Osman because he wanted to marry her for a child which she couldn't produce.

After Nikola is stabbed by Osman, Flatyos attempts to take revenge on Osman with a gunpowder plot on Söğüt. Osman however, is aware of the attack and Flatyos' plans backfire. Flatyos is captured and is taken to Kulucahisar where the "incompetent" Dündar and Savcı are saved by Osman who were about to be beheaded by Nikola.

Targun goes to meet her father at Kulucahisar but is spotted, when she returns, Osman captures her and she is forced to tell the truth. Osman vows to help her save her father and also decides to marry her after Bala says that he needs an heir to become the Bey. He also attacks Kulucahisar while Nikola goes to meet Arslan at the Çobanoğlu tribe.

Osman reconquers Kulucahisar, although İnal Bey is taken by Nikola's knights to İnegöl. Bala and Targun's relations tensen a little and Dündar's evil plans are also revealed, he seeks to become the Bey of the tribe.

The tensions escalate further upon the death of Argun, who was killed by Geyhatu, and Geyhatu's visit to Tabriz in order to become the Han of the İlhanlı (transl. Ilkhanate). Nikola vows to ally with the powerful Geyhatu in order to destroy the Turks. Ertuğrul also recovers and stops Savcı from becoming the Bey (which is a part of Dündar's plans) while Yavlak allies with Osman to help him against Geyhatu.

Targun and Osman make a plan to kill Nikola and rescue İnal Bey in which they succeed in rescuing İnal but fail to kill Nikola and only injure him. Ertuğrul dies just before he could announce that Osman is the new Bey.

The tribe elections are held to decide the new Bey. Dündar comes face-to-face with Osman however, Osman is elected as the new Bey much to Dündar's despair and anger. Meanwhile, a new threat against the Kayı tribe emerges after Petrus, sent by the Pope, arrives to help Nikola kill Osman but also has a secret plan which he doesn't tell Nikola about. Bayhoca, Savcı's son, also returns.

After a series of events including Bala being poisoned by Targun, Targun and Göktug are exiled, which is part of Osman's plans. Dündar has a meeting with Nikola which Osman is aware of resulting his beating when he returns. Petrus' real plans are also revealed, he wants to know what the Turks of Anatolia are planning by seizing some scrolls.

Dündar and the Kayı make a trade deal with Tüccar Melik and Süleyman (Simon and Petrus), Ertuğrul comes in Osman's dream reminding him of his will for his second marriage and Nikola is made the "Tekfur of Tekfurs" while his army from Constantinople, led by Alexander, is destroyed by Osman in a great battle. Alexander survives.

Bala seeks to marry Aksu Hatun to Osman as per Ertuğrul's will, although Aksu is Hazal's adoptive daughter and unknowingly ends up working in her devious schemes. The Kayı flag is also changed by Osman along with Bayhoca being captured by Nikola after a series of events.

Going against his loved ones' advice, after Savcı is tricked and wounded by Flatyos, Osman agrees to surrender Kulucahisar in exchange for Bayhoca. However, he makes a plan and re-conquers the castle immediately after surrendering it, killing Alexander. Meanwhile, a desperate Lena seeks her former lover Flatyos' help, angering Savcı. İdris, Petrus' spy in the Kayı, also begins to set a trap for Bamsı on Petrus' orders, whilst Göktug and Targun return and offer Flatyos an alliance.

As the allied enemies, Nikola, Targun and Petrus continue to stir traps for Osman, Targun ambushes Bala while İdris leads Bamsı into a trap set by Aya Nikola in order to seize the scrolls with Osman's plans for Anatolia. When Osman is alerted, he sets out with half his alps to find Bamsı, only to fall in Nikola's trap and have his tribe pillaged by Targun for the scrolls and a failed attempt by Dündar to become the Bey. Aksu is also killed by Targun before she can confess to Bala about Dündar and Hazal's misdeeds.

Göktuğ helps Bala defeat Targun in a trap, with Bala eventually killing her. Meanwhile, Osman is saved from Nikola's ambush by Malhun Hatun, a woman requesting Osman for some land for her tribe of 1000. As Malhun settles in the tribe, she questions Osman about his plans. Göktug is made leader of the Cuman Turks, whilst Petrus and Simon demand compensation from Osman for allegedly being attacked. İdris is caught as a spy by Osman, although he is killed by Dündar before he can reveal his treachery.

Osman goes after İdris' killer, but Dündar is saved by Petrus. Meanwhile, Göktuğ learns that Nikola is travelling to Constantinople, and sends word to Osman. Dündar later allies with Petrus and reveals Osman's intentions to ambush Nikola whilst he is on his journey. Meanwhile, the cynical Malhun discovers Dündar's thumb ring, having been dropped when he was in Söğüt, and attempts to find the traitors in the Kayı. As Osman's ambush is foiled by Nikola after learning of it from Petrus, Bayhoca is shot and wounded by Flatyos.

Osman and his alps are forced to retreat from the battle, whilst Bayhoca later dies from his wounds. Flatyos is soon captured by Osman, and is taken to the Kayı tribe in order to make him reveal the traitor in the tribe. However, on Dündar's urging, Savcı and Lena kill Flatyos to avenge their son, inadvertently covering Dündar's tracks. Meanwhile, Petrus allies with Geyhatu's commander Togay, who arrives seeking to annihilate the Bayındır and Kayı tribes.

Togay, revealed to be Baycu Noyan's son, attacks a meeting of Turkmen Beys chaired by Osman in Söğüt, wounding Ömer Bey. Seeking to sow discord amongst the Turks, Togay frames the Dodurga Bey İvaz Bey for the attack, although his innocence is later revealed. Meanwhile, Lena, having given birth to a son named Ertuğrul, accepts Islam with the help of Şeyh Edebali. Suspecting Dündar's treachery, Osman attempts to set a trap for Dündar and Togay, although Dündar outwits Osman, causing Togay to attack and wound Malhun.

Osman captures Suci, one of Togay's henchmen. However, Suci is also Cerkutay's blood brother and friend, compelling Cerkutay to save his friend, leading to the tribe believing that Cerkutay is a traitor. Cerkutay, actually serving Osman, later helps the Kayı attack Togay's forces. Meanwhile, a recovered Malhun is sent by her father to İnegöl to ally with Nikola against Togay, although she is captured in the castle by Togay, who has allied with Nikola. Osman also captures Nikola's ally Tekfur Aris, seeking to ally with him, although Togay delivers an ultimatum to surrender the Tekfur in exchange for Malhun.

Osman decides to use Tekfur Aris as bait to trap Nikola. However, Togay kills Aris on the way, providing Nikola with an excuse to keep Malhun in captivity. Nikola also kills Zülfikar Derviş, Osman's spy in İnegöl. Nikola also releases Malhun to gain the support of Ömer Bey, who seeks to sell him horses in order to infiltrate and conquer the castle. The sale of horses angers Osman, who orders them to be seized. Meanwhile, Togay ambushes some of the Kayı on the way back from Boran Alp's unfinished wedding, wounding Gonca Hatun and killing Abdurrahman Gazi.

After Togay leaves for Konya, his fellow commander Camuha arrives. After Nikola learns Camuha's whereabouts from Dündar, he informs Osman, leading to a successful ambush, although Camuha escapes. Meanwhile, Osman attacks the incoming Kalanoz, younger brother of Kalanoz, after learning of his arrival indirectly from the Mongols, killing many Byzantine soldiers. He invites all Turkmen tribes to join the attack except the Bayındırlı, angering Ömer Bey. Şeyh Edebali later calls Osman and Ömer Bey to Söğüt to resolve their differences, leading to Ömer Bey handing over Dündar's ring to Osman, exposing Dündar as a traitor.

Dündar flees from Söğüt after being exposed as a traitor, and takes refuge with Nikola in İnegöl. The revelation that Dündar is a traitor infuriates Gündüz and Savcı and saddens Aygül. Meanwhile, Petrus and his right-hand man Simon attempt to kill Hazal to cover their tracks, but are stopped by Osman Bey and are captured, with Hazal put under house arrest. Osman sends Gündüz as a messenger to İnegöl and offers a ransom for Dündar, although Nikola declines and demands more gold via Ömer Bey. Eventually, Osman uses Simon to lure Dündar into a trap, capturing him.

Due to the pressure of the Mongols, Tekfur Yason imposes heavy taxes, causing the people of Yarhisar to take shelter with Osman Bey. Nikola also finds out about Simon and Petrus being captured by Osman and kills Simon after realising Osman is using him. Refusing Togay's demand to turn over the refugees, Osman Bey causes the Byzantine-Mongol alliance to be re-established. While Togay plans a major operation against Kayı Tribe, Malhun Hatun, who wants to take Osman's side in this war, confronts her father, Umur Bey.

Osman Bey confronts the Byzantine-Mongol army with the support of Malhun Hatun. In the ensuing battle, Savcı Bey is stabbed by Kalanoz in the back and dies, which prompts Osman Bey to kill Kalanoz in revenge. Nikola, who gathers troops from the local landlords, plans to raid Umur Bey’s tribe in response to Malhun Hatun's participation, whilst Umur Bey, decides to exile his daughter for fighting against his will. Looking for ways to break the Byzantine-Mongol alliance, Osman Bey agrees to pay taxes to the Mongols, surprising everyone. Togay, who is strengthened by the lands given to his command, plans to turn this situation into an opportunity to consolidate his domination in the region.

Osman Bey's expulsion of the ambassador who comes to the tribe to receive the tax causes Togay to break his truce. This causes the Seljuk Sultan, Mesud II, to summon Osman Bey to Konya to punish him in order to protect him from the wrath of the Mongols. Learning that Osman Bey refused to pay taxes to the Mongols from a spy in the tribe, Nikola takes action to increase his influence by taking advantage of the Mongol-Turkish war. Bamsı Bey also kills Petrus after Osman realises Simon was killed by Nikola. Cerkutay, on the other hand, becomes a Muslim under the witness of Sheikh Edebali. Umur Bey develops a plan to attack Togay, which is opposed by Osman. After a confrontation between the pair, Sheikh Edebalı tells Osman Bey that he must marry Malhun Hatun in order to gain the support of Umur Bey and achieve the goal of uniting the Turkish tribes.

After Sheikh Edebalı intervenes and prevented a possible conflict between Osman Bey and Umur Bey, Umur Bey stands down. Meanwhile, Nikola takes action to destroy the truce between Osman Bey and Togay, with Osman's plan to trap Togay being ruined. While Osman Bey, sends Göktuğ as an envoy to Togay to ensure he remains loyal to the agreement; Sheikh Edebali takes on the task of persuading Umur Bey about marriage. Osman Bey, on the other hand, explains to Bala Hatun that he decided to marry Malhun Hatun after consulting with Sheikh Edebali.

Umur Bey and his alps are captured by Togay after ignoring Osman Bey's order not to launch an attack. Meanwhile, Togay's commander Camuha raids the vulnerable Bayındır tribe with his sentries, with Malhun Hatun and a handful of alps battling to defend the tribe. Later. Umur Bey, left alone and trapped by Nikola, regrets his failure. Osman Bey, who takes immediate action to heal the wounds of Umur Bey, holds Umur Bey to account for disobeying his command.

A wedding ceremony is set up in Kayı Tribe for the marriage of Osman Bey and Malhun Hatun. While the wedding is being held, Bala Hatun grieves despite her consent to this marriage. With the arrival of the winter season, after the wedding ceremony, it is decided that Kayı tribe will migrate to Domaniç Plateau. While preparations continue in the tribe, Togay breaks the agreement and decides to attack Osman Bey, despite the warnings of the Mongol governor Yargucu. In the ensuing battle, Togay kills Bamsı Beyrek after a fight.

After Bamsı Bey's martyrdom, Osman Bey takes an oath to avenge him. Togay, meanwhile, develops an alliance with Nikola and establishes a large army to strike a last blow to the Kayıs. Togay, who enlarges his army with the soldiers he receives from Nikola, stands against Osman Bey and his alps in the battlefield. However, Nikola withdraws from the battle after having a prior agreement with Gündüz Bey, although Governor Yargucu arrives and takes Togay into custody.

After Osman lures Togay from custody into a trap, he captures and beheads him in Söğüt. The abduction and execution of Togay angers the Governor Yargucu, who subsequently demands Kayı Tribe pay a three-year tax within three days. Yargucu also forms an alliance with Nikola. Later, Malhun Hatun reveals to Osman that she is pregnant and Göktuğ's lover Zoe is revealed to be serving Nikola.

Osman Bey takes action to prepare for a war he will wage against the Byzantine army led by a commander named Dukas. Osman goes to Konya to meet with the Seljuk sultan, whilst Governor Yargucu, plans a move against Osman Bey. Increasing his power with the arrival of Commander Dukas in İnegöl with his army, Nikola thinks that he has the opportunity he is looking for to drive the Turks out of the edge. Bala Hatun, who learns that Osman Bey will have a child, tries to control her feelings and takes a step towards Malhun Hatun. Osman Bey, on the other hand, goes to battle with Dukas' Byzantine army.

Before the battle, Osman raids the Byzantines and seizes ammunition, before going to battle with the support of Turkmen and Seljuk forces. During the battle, Dukas and local Tekfurs are killed by Osman's forces, with Nikola and Helen escaping alive, and Turhan Alp being martyred. Meanwhile, Zoe tries to poison the pregnant Malhun Hatun but is caught and arrested. After the battle, Osman's son Orhan is born, whilst Bala reveals to Osman that she is pregnant and Osman decides to establish a state after visiting the Aksakals.

Osman Bey establishes his headquarters in Yenişehir, acting on crucial information from his spy in Constantinople. He faces threats from Northern warriors Olof and Frigg. Bala Hatun and Malhun Hatun prepare for a market in Yenişehir, leading to tensions between Bengi Hatun and Malhun Hatun. The competition between Aktemur and Alçiçek adds to the growing tension.

Osman Bey thwarts Kantakouzenos' plans in Constantinople, but the cunning strategist persists in his game. Kantakouzenos initiates a new strategy, enlisting Olof's aid as the first step. Olof, driven by revenge for his brother Saga, arrives in Yenişehir with his men at Kantakouzenos' behest. Their goal is to besiege Osman Bey, plotting to attack him from both external and internal fronts.

Olof's personal stake in Yenişehir drives him to take risks, while his lover Frigg poses a threat to Malhun Hatun. In Constantinople, Kantakouzenos involves Ofelia, further complicating matters. Osman Bey takes on the responsibility of confronting and resolving the chaos, arranging a meeting with Olof in the arena.

Osman Bey is ambushed by Olof, revealing a larger scheme involving the kidnapping of his sons and false accusations against Öktem Bey. Ofelia is suspected as the prime culprit. Emperor Andronikos orders Olof to kill Osman Bey and his daughter, Ophelia, escalating the danger for the family.

The attack on Aktemur has greatly shaken Osman Bey's trust, leading him to establish a court to address the situation. Both Öktem Bey, who is accused of stealing gold, and his daughter, Alçiçek Hatun, who injured Aktemur Bey, will face trial. Osman Bey's decision to establish a court signifies his commitment to ensuring justice is served in these matters.

Osman Bey and his soldiers are trapped in a mine after Olof discovers their hiding place. Their survival is uncertain, causing growing concern. Malhun Hatun urges Bala Hatun and the soldiers to rescue Osman Bey. The main question now is how they will escape the mine and overcome the imminent danger.

Ismihan Sultan opposes Osman Bey's ambitions in Yenişehir. The control of the Marmaracik Citadel is contested. Osman Bey battles self-doubt while planning to conquer Köprühisar. Olof seeks new tactics after losing to Osman Bey. Intrigue and developments continue to unfold.

Osman Bey remains determined to conquer Köprühisar and is willing to take risks to achieve his goals. However, complications arise in the love story between Aktemur and Alçiçek, as Bayındır becomes an obstacle. Ismihan Sultan grows uneasy about Osman's ongoing conquests. Conflicts and challenges arise as Osman's ambitions clash with the desires of those around him.

Tensions escalate as Ismihan Sultan exposes Osman Bey's headquarters and plans. She seeks to hold him accountable and employs various strategies, including attacks by Olof and Frigg. Ismihan Sultan aims to isolate Osman Bey, seize his principality, and claim his properties. The conflict intensifies as they both strive to protect their interests and maintain their positions.

Osman Bey and his Alps attempt to capture İnegöl castle from Turgut Bey, but face opposition from Turgut Bey, Kantakouzenos, and Ismihan Sultan. Negotiations ensue, with Osman Bey demanding the castles acquired through sacrifice. Olof plans to meet with Ismihan Sultan. Meanwhile, Osman Bey works to install Sultan Mesud on the throne, unaware that Konya has been handed over to a Mongol commander.

Osman Bey is captured by Ismihan Sultan, and his escape attempts fail. However, Alaeddin Bey reveals that Osman Bey is in the palace under Sultan Alaeddin's supervision. Osman Bey confronts Sultan Alaeddin, who offers his release if Alaeddin Bey stays with him. Ismihan Sultan plans to seize Yenişehir and creates conflict between Bala Hatun and Malhun Hatun.

Osman Bey receives crucial information from Sultan Mesud about Ismihan Sultan's plans involving a significant seal. To counter her schemes, Osman Bey assigns Bala Hatun to acquire the seal. Sultan Alaeddin issues a death warrant for both Osman Bey and Sultan Mesud, leading to severe injuries for Sultan Mesud. Determined to protect the castles, Osman Bey takes action. Ismihan Sultan manipulates the situation in Yenişehir, worsening the famine, but Malhun Hatun devises plans to counter her.

Ismihan Sultan captures Sheikh Edebali and uses him as bait to trap Bala Hatun in Marmaracik Fortress. Osman Bey confronts Olof and Ismihan Sultan when he attempts to rescue them. Ismihan Sultan is determined to achieve her goals and demands the presence of Sultan Mesud to spare their lives. In the meantime, a contagious disease spreads in Sogut, causing concern. Malhun Hatun and Kumral Abdal face unexpected danger while searching for a cure. Finding an antidote becomes crucial to save the city from destruction.

Osman Bey is captured by Sultan Alaeddin at Marmaracik Fortress. Sultan Alaeddin issues a death warrant, but Ismihan Sultan has a different plan for Osman Bey. She intends to have him abducted by Kantakouzenos and Olof, claiming he has escaped. Ismihan Sultan also decides to expel the Kayis from Yenisehir. The people face famine and disease, adding to their difficulties. Osman Bey and his tribe confront internal conflicts and external threats, making their situation challenging.

Tensions rise as Mongolian Commander Nayman demands a ransom for Samagar's murder. Ismihan Sultan summons Germiyanoglu, Candaroglu, Karesioglu, and Osman Bey. The Beys hold Osman Bey responsible and insist he pay the ransom. However, Osman Bey stands firm, refusing to negotiate. He asserts their equality and rejects paying any price for Samagar's head. Meanwhile, Olof gathers a large Byzantine army, posing a threat to Inegol. Osman Bey faces challenges from both the Mongols and Olof, endangering his principality.

Nayman's arrival in Konya with a large Mongolian force unsettles the people. Osman Bey vows to confront him, rallying the tribes in Gaza for support. However, the nobles hesitate to join him. Ismihan Sultan schemes against Osman Bey, planning to poison Orhan with Alaeddin's sword. Turmoil ensues as news of the poisoning spreads. Bayındır Bey holds a grudge and prepares to confront Osman Bey. Tensions rise, presenting challenges to Osman Bey's leadership and the camp's stability.

Nayman's rage grows when he doesn't receive the expected gold, threatening the sons of Karesi, Candar, and Germiyan Beys. The Beys intervene to protect their children, but Osman Bey decides to fight back. Those who deceive him meet their demise. Nayman is determined to bring bloodshed to the frontiers. Esma confesses to poisoning Orhan, revealing Avci as the manipulator, sparking Malhun Hatun's desire for revenge.

Nayman locates his lost gold but falls into an unexpected trap. Osman Bey remains resolute in his conquests despite internal and external challenges. He sets his sights on Inegol and aims to collaborate with Ismihan Sultan. The method to win her support is uncertain. As Osman Bey approaches Inegol, Nayman seeks a valuable asset. Undeterred, Osman Bey persists in his conquest, while the Hatuns plan to eliminate Frigg.

Oktem Bey's death brings grief to Yenisehir, but Osman Bey remains resolute. Nayman unexpectedly offers Osman Bey a role as his commander, shocking Ismihan Sultan. Ismihan doubts Osman Bey will accept the offer, while Nayman remains confident. Bengi Hatun is disappointed and disturbed by the possibility of Osman Bey's acceptance and confronts him. Nayman confronts Ismihan Sultan for her actions, but she defends herself by claiming loyalty to Osman Bey. Nayman plans to kidnap Turkmen children to strengthen his control, causing concern for Malhun Hatun and Bala Hatun.

Nayman falls into an unexpected trap set by Osman Bey while searching for lost gold. Osman Bey remains determined despite internal and external challenges, continuing his conquests from where he left off. His next target is Inegol, requiring collaboration with Ismihan Sultan. Osman Bey's approach to persuading Ismihan Sultan remains uncertain. As they near Inegol's walls, Nayman becomes fixated on seizing Osman Bey's prized possession. Undeterred, Osman Bey persists in his quest to conquer Inegol. Oktem Bey supports him, and the Hatuns plan to eliminate Frigg.

The martyrdom of Oktem Bey brings sadness to Yenisehir. Nayman surprises Osman Bey with an offer, wanting him to become his commander. Ismihan Sultan believes Osman Bey will reject the proposal, but Nayman remains confident. Bengi Hatun confronts Osman Bey and tries to persuade him with Nayman's offer, becoming disheartened by his hesitation. Nayman questions Ismihan Sultan's loyalty, prompting her to maintain appearances of loyalty to Osman Bey. Nayman plans to kidnap Turkmen children and turn them into nokers, alarming Malhun Hatun and Bala Hatun.

Nayman seeks revenge against Osman Bey, luring Orhan Bey to his headquarters under false pretenses. Osman Bey sets a trap to defeat Nayman in Yenisehir. Finding the seal becomes Osman Bey's priority, while Nayman assigns Bayindir Bey to retrieve it, pursued by Turgut Bey. Bengi Hatun appoints Aktemur as leader, causing discontent among Malhun Hatun and Bala Hatun. Ayse Hatun worries about her son's future. The unexpected arrival of Black Midwife Feristah, Ulgen Hatun's mother, brings surprise but leads to an unpleasant encounter with Cerkutay.

Nayman proposes a one-on-one fight to Osman Bey, with high stakes for victory or defeat. As Osman Bey prepares for the battle, he entrusts his vision to Bala Hatun. Meanwhile, news arrives that Aktemur Bey has taken leadership of the Kargın tribe. Nayman expresses confidence in ruling the frontiers, challenging Osman Bey's fate. The Alps intensively prepare for the battle against Nayman. Ismihan Sultan sees an opportunity to benefit from the conflict between Osman Bey and Nayman.

Despite challenges from Ismihan Sultan and Nayman, Osman Bey persists in his conquests with a clear goal. He prepares extensively for the conquest of Köprühisar. However, a devastating surprise awaits as Ismihan Sultan collaborates with Nayman to destroy Osman Bey. Ismihan assigns Bayındır Bey to assassinate Osman Bey in his mansion, while Bengi Hatun supports Ismihan Sultan. Nayman attacks Osman Bey's war headquarters, and the mansion is engulfed in flames.

Nayman's ruthless raid injures Bala Hatun and sparks Osman Bey's determination for revenge. Turgut Bey and his Alps are captured by Nayman, facing decapitation. Holding Turgut Bey hostage, Nayman threatens Osman Bey's compliance. In response, Osman Bey prepares an unexpected plan. Ismihan Sultan provokes Sultan Alaeddin, solidifying her opposition to Osman Bey.

Nayman seeks an alliance with the Tekfur of Bursa against Osman Bey, causing Osman to confront the Tekfur directly. Ismihan Sultan collaborates with Nayman, planning to eliminate Osman Bey from within. Meanwhile, Osman assigns Cerkutay to counter Nayman's power. The situation intensifies as Osman realizes Nayman's target is Yenişehir.

Malhun Hatun is imprisoned for attempting to kill Ismihan Sultan. Osman Bey is determined to rescue her and refuses to leave her behind. Bala Hatun tries to persuade Bengi Hatun to testify truthfully, but it puts Alçiçek's life in danger. Lord Valens is aware of Osman Bey's plan to crown Sultan Mesud, and Ismihan Sultan plots a trap for him. Osman Bey finds himself in a difficult situation, cornered by these circumstances.

Despite being taken to death row, Osman Bey remains hopeful. Meanwhile, Bala Hatun receives Esrigün, the commander of Gazan Han, and his adopted daughter. On the other hand, Malhun Hatun departs to assist the Kargın tribe.

As Osman Bey continues to pursue his goal of establishing a state, he finds himself facing formidable adversaries. He not only grapples with enemies disguised as friends within his own ranks but also engages in a battle against the Byzantine Empire on the outside. Osman Bey has set his sights on a specific objective: the conquest of the Marmara Fortress, a crucial step towards gaining control over Bursa and Iznik, and further advancing his ambitions.

Osman Bey and his warriors are trapped by Tekfur Valens, but Bala Hatun arrives to support them. Nayman ambushes Malhun Hatun and Fatma's life is endangered. Tekfur Valens discovers Osman Bey's camp, setting the stage for a fierce confrontation. Osman Bey's united followers are prepared to fight by his side.

Nayman's determination to harm Osman Bey leads to a fierce battle, but Osman Bey captures him. Tekfur Valens shifts his focus to destroy Osman Bey with a formidable army, planning an unforeseen scheme.

Osman Bey displays keen awareness of Commander Muzalon's actions and strategically launches a dual-sided attack, resulting in a decisive victory for Osman Bey and his forces over Byzantium and Muzalon's army in the Koyunhisar region. This triumph holds significant implications for both Byzantium and Anatolia, signifying the true beginning of Osman Bey's independent Beylic. Riding across the land, Osman Bey emerges as a respected leader, garnering attention and admiration from the East, West, and Turkmen Beylics.

Years after the Bapheus victory, Osman Bey's children have become beys. As Osman Bey continues his conquest for Bursa, news arrives that Sultan Mesud has been poisoned, sparking a power struggle for the Sultanate. Bala Hatun, grieving the loss of her child, battles a serious illness. Germiyanoğlu Yakup Bey, who set up a market on the Yenişehir-Germiyan border, survives an assassination attempt marked by a Kayı, raising tensions with Osman Bey. Vasilis, a hidden enemy, plots to revive Rome amid the search for a new sultan. Osman Bey sends his son, Alaeddin Bey, to Konya following the poisoning news, where Yakup Bey’s daughter also arrives, with Yakup Bey aiming for the Sultanate. In weakened Konya, irregulars settle in Uçlar. Orhan Bey invites these Sancaksız irregulars to join Osman Bey’s holy war, and this news reaches Yakup Bey’s son, Mehmet. Amidst these events, poet Yunus Emre arrives in Yenişehir, potentially influencing Osman Bey's spiritual life.

Yakup Bey confronts Osman Bey, demanding his allegiance. Cerkutay returns to Yenişehir Palace, creating a festive atmosphere but harbors anger towards Osman Bey. Yakup Bey puts Osman Bey in a difficult position with his Lefke move, but Osman Bey intends to outmaneuver him, knowing Yakup Bey's true intentions. Meanwhile, tension rises between Mehmet and Orhan over Holofira, who wants to return to her homeland but faces opposition from Orhan. Gonca seeks a treasure map from Alaeddin Bey, leading to their confrontation at the caravanserai. Alaeddin reunites with his mother, Bala Hatun, who informs him of Yakup Bey's demand for allegiance from Osman Bey. Saadet Hatun arrives in Uç Pazar and reacts strongly upon learning of the assassination attempt on her husband, Yakup Bey. Osman Bey plans to host all the beys and Yakup Bey in his palace, but the real outcome of their tension is yet to unfold.

Osman Bey believes Sultan Mesud's treasure is the key to ending Yakup Bey's dominance. He tasks Orhan Bey with finding the treasure and Alaeddin Bey with monitoring Yakup Bey. Learning of the treasure, Yakup Bey is determined to claim it for power, setting the stage for a race between the two factions. As Orhan searches for the treasure, he crosses paths with Holofira, while Mehmet Bey, under his father's orders, plans to seize it, creating tension between him and Orhan. Meanwhile, Alaeddin's surveillance of Yakup leads to a personal moment with Gonca Hatun, where he questions her feelings for him. Elsewhere, Osman confronts the Sancaksız people for their actions, while tensions rise between Malhun Hatun and Saadet Hatun in the Uc Pazar, where Yakup appoints Cerkutay as patron. Osman and Bala Hatun travel to address unrest, unexpectedly encountering Yakup Bey, who claims the area as Germiyan's property, further escalating their rivalry over power and the treasure.

Yakup Bey conquered Lefke Castle before Osman Bey and claimed to give it to him, but Osman Bey suspects Yakup Bey's intentions. A new enemy, Master Gera, arrives at the Edges. Disguised as a merchant, he meets Osman Bey, who invites him to Yenişehir. Master Gera's arrival brings chaos, and he plans to kill Boran Bey, Osman's trusted man. Malhun Hatun, aware of Saadet Hatun's grudge, plans a significant move against her. Meanwhile, Orhan Bey, disguised as a Mongol, takes a treasure and shoots Mehmet Bey, leaving his fate uncertain. Finally, Yakup Bey confronts Osman Bey, asking for allegiance one last time, and Osman Bey must decide his response.

Osman Bey plans to unite against the Mongols by paying their tax and gathering an army with Yakup Bey. Despite the raid on Yenişehir Palace and the stolen treasury, he remains determined. Tensions rise among the women as Malhun Hatun and Saadet Hatun clash, with Bala Hatun joining in. Saadet Hatun targets Holofira to undermine Orhan, while Bala Hatun worries about her son Alaeddin's involvement with Gonca. Cerkutay visits the injured Boran Bey, hoping to mend relations with Osman Bey and the Alps. Orhan Bey finds the stolen treasure at Bayındır Bey's place, leading to an execution order for Bayındır Bey. Master Gera causes chaos in Söğüt, starting a fire that Alaeddin Bey and Bala Hatun must extinguish. Osman Bey faces unexpected challenges from the Mongol Commander while trying to pay the tax.

Osman Bey and his alps escape from the Mongols and plan a counter-raid. News of a raid on Söğüt spreads, causing alarm. Malhun Hatun plans to counter Yakup Bey, who might exploit Osman Bey's absence. Orhan Bey is unhappy seeing Holofira in the market, and Malhun Hatun warns him about trusting Byzantium. Saadet Hatun wants Holofira as her bride and influences Gonca Hatun to tie Alaeddin to Yakup Bey. Tensions rise as Orhan Bey opposes Yakup Bey's control over Yenişehir. Yakup Bey prepares for conquests, placing his son Mehmet Bey in command, which Orhan Bey disapproves of. Danger approaches the cave where Osman Bey and his alps take shelter. Mehmet Bey and Orhan's tension escalates during their conquest, with Mehmet ordering Orhan's assassination, but unexpected events unfold. Osman Bey remains determined to resist threats to his rule, declaring his resolve for freedom.

Osman Bey and Yakup Bey rush to Kestel to rescue their captive children, Orhan and Mehmet. The Tekfur of Kestel demands castles in exchange for their release. Yakup Bey agrees, but Osman Bey opposes, aiming to rescue the children and conquer Kestel. Yakup Bey blames Osman for Mehmet's capture, urging him to find the palace traitor. Alaeddin informs Malhun Hatun that Holofira is the traitor, possibly influenced by Vasilis. Orhan and Mehmet endure torture in Kestel Castle, unaware that Master Gera is behind Tekfur Makranos. Bala Hatun confronts Saadet Hatun, refusing to surrender the castles and imprisoning Saadet and Gonca. Yakup Bey negotiates with the Tekfur, potentially defying Osman Bey's stance. The situation escalates as Osman Bey must decide his next move.

Karacelasun seeks vengeance for his brother and meets Master Gera, considering an alliance. Orhan Bey and Holofira's love grows, but Malhun Hatun upsets Holofira. Alaeddin Bey and Gonca Hatun clash, and Karacelasun raids the Uch Bazaar, angering Mehmet Bey who blames Osman Bey. Osman Bey, aware of danger, remains steadfast. Yakup Bey and the Turkmen Beys meet, refusing to let the Mongols or Byzantines prevail. Osman Bey knows the Mongols and Turkmen Beys are after him and Yakup Bey. Yakup Bey’s life is in danger. Osman Bey and his alps face traps trying to save Yakup Bey from Karacelasun's ambush. The outcome remains uncertain.

Osman Bey rescues Yakup Bey from Karacelasun, emphasizing his commitment to Islam. Karacelasun seeks revenge with a new plan against Osman Bey, who assigns Orhan Bey to thwart him. Gonca Hatun's condition worsens, prompting Alaeddin and Mehmet to search for a cure. They encounter Crusader soldiers, and Yakup Bey, aware of Gonca's condition, vows to hold the Mongols and the Kayı accountable if she suffers. Alaeddin Bey struggles to find a cure for the poisoned victims in Uç Pazar, growing increasingly desperate. Cerkutay, in anguish, holds his poisoned child, with Ülgen Hatun also deeply affected. Yakup Bey manipulates Cerkutay against Osman Bey, blaming him for their misfortunes. Vasilis, revealed as a traitor, takes refuge with Yakup Bey, accusing Osman Bey of deceit. Yakup Bey, enraged, plans to hold Osman Bey accountable, escalating the tension between them.

Karacelasun seeks revenge and allies with Master Gera to kill Osman Bey's son, Alaeddin. Bala Hatun, learning of Alaeddin's capture, confronts Saadet Hatun at Uç Pazar. Karacelasun encounters Orhan Bey in a fight, but Osman Bey appears, cornering him. Orhan Bey declares his desire to marry Holofira, and Malhun Hatun explains the sacrifices required to be a Bey's lady. Orhan Bey and Alaeddin Bey capture Vasilis, and Yakup Bey reacts to Vasilis' escape from Uç Pazar. Alaeddin Bey faces an attack in his tent, putting his life in danger. The tension between Osman Bey and Yakup Bey continues, with Yakup Bey keeping the Sancaksızlar’s secret. Orhan Bey, seeing Mehmet Bey give Holofira a ring, takes her away on his horse. Osman Bey hosts all the Beys in Yenişehir to address their grievances, closing the gates while they are inside. This move's purpose remains uncertain, as does whether it will clear him of suspicion.

Osman Bey hints at knowing Yakup Bey's schemes, planning to reveal them while hosting the beys. Orhan Bey takes Holofira, causing tension with Mehmet and confrontations with Saadet and Malhun Hatun. Alaeddin confesses his love to Gonca, seeking Bala Hatun’s advice. Yakup Bey plans to exchange Vasilis for gold with the Crusaders, influenced by Master Gera. Malhun Hatun insists Holofira must become a Muslim to marry Orhan, which she refuses. Karacelasun clashes with Mehmet, Orhan, and Alaeddin during the Vasilis exchange, winning the fight. Osman Bey blames Yakup Bey and plans to save his children from Karacelasun.

Orhan, Alaeddin, and Mehmet Beys fight Karacelasun with all their might, seeking to break his superiority. Osman Bey suspects Ayhan Ağa advised Yakup Bey on the exchange, aiming to uncover the truth and reveal Master Gera's true face. Yakup Bey considers Mehmet's entrapment a weakness and plans to make him pay. Osman Bey faces Karacelasun to avenge his martyrs, leading to a significant clash. Gonca Hatun and Alaeddin Bey confront each other, but Gonca's response disappoints Alaeddin, who remains skeptical. Yakup Beys request Holofira from her aunt Olivia, awaiting their consent. Orhan, angered by Mehmet's actions regarding Holofira, reacts furiously and contemplates his next move.

Osman Bey establishes an independent principality, celebrated with prayers and festivities in Yenişehir. Yakup Bey sees this as a challenge, questioning what his next move will be when facing Osman Bey. A new threat arises with Gorklu Khan, an Ilkhanate emir aiming to marry the Byzantine Princess. This marriage could strengthen Byzantine-Ilkhanate relations and threaten the Turks in the Borders. Osman Bey, aware of the danger and Gorklu Khan's hostility, strategizes to prevent the marriage and take Princess Maria, aiming to safeguard the fate of the Turks.

Osman Bey vows revenge after witnessing the great massacre in Söğüt. He prepares to confront Gorklu Khan. Yakup Bey informs Yenişehir tradesmen that he won't collect taxes in Uç Pazar, leading to a plan by Bala and Malhun Hatun to counter this move. Saadet Hatun threatens Ülgen Hatun by revealing that Cerkutay is spying, causing Ülgen to make a critical decision. Saadet Hatun also tells Bala Hatun that Alaeddin should stay away from Gonca, with an unclear motive behind her warning. Gorklu Khan threatens Yakup Bey while searching for the princess, putting Yakup Bey in a difficult position. Karacelasun kidnaps Holofira to exchange her for the princess, leading to a confrontation with Orhan Bey. The outcome of their entrapment remains uncertain. Finally, Osman Bey and Gorklu Khan face each other with their armies, ready for a significant encounter.

Osman Bey, determined to establish a state, faces Karacelasun, who raids Uraz Bey's camp, and Görklü Han, who prepares for war at Yenişehir's gates. Osman Bey's response to the Mongol threat is crucial. Bala Hatun and Malhun Hatun plan to rescue Orhan Bey and Holofira from the Mongols. Meanwhile, Mehmet Bey goes into a frenzy upon seeing Alaeddin Bey and Gonca Hatun together, leading to a significant fight. Holofira's aunt Olivia, with Yakup Bey's support, demands an explanation at Yenişehir Palace, causing a confrontation between Osman Bey and Yakup Bey. These events highlight the growing tension and conflicts Osman Bey must navigate to achieve his goals.

Orhan Bey, Olivia, and Kite meet Tekfur Leo, who promises them Princess Maria. Orhan Bey's motives are unclear, and the situation impacts his love with Holofira. Following the Yenişehir raid, Alaeddin Bey prevents Yakup Bey from leaving, citing a traitor. Osman Bey aims to keep Yakup in Yenişehir for strategic reasons. Cerkutay faces trial for espionage in Yenişehir, with an execution order looming. Yenişehir remains unsettled as Yakup Bey is shot with an arrow. Saadet Hatun blames Osman Bey's people and confronts Bala Hatun. A new threat emerges with Taceddin Noyan, known for cruelty. Elçim Hatun informs Osman Bey, leading to uncertainty about the Kayıs' fate against Noyan.

Osman Bey faces two new enemies: Taceddin Noyan and the Executioner of Rome, aware that the Tekfurs may rebel. His new goal is to conquer Kite Castle, and he must decide on a strategy. Malhun Hatun is unsure about going on a pilgrimage after a confusing dream. Meanwhile, Saadet Hatun seeks forgiveness from Bala Hatun, potentially easing tensions between Germiyan and Kayı. Alaeddin Bey, angered by Gonca's spying, confronts her harshly, leaving their future uncertain. Orhan Bey, on duty with Elçim Hatun, must clarify their situation to Holofira, who is disappointed by what she sees.

Taceddin Noyan aims to make Osman Bey submit, but Osman plans a counter-move. Taceddin Noyan meets Mehmet Bey in Uç Pazar, and Gonca Hatun, aware of this, informs Alaeddin Bey before being shot. Byzantine Executioner Imren Tegin arrives in Uclar to join forces with Taceddin Noyan. Osman Bey, having captured Karacelasun, confronts Taceddin Noyan to intimidate him, with the outcome of their encounter pending.

Osman Bey surprises Taceddin Noyan by attacking his army at headquarters, catching and punishing him in his tent. Efendize Elçim Hatun and her sister-in-law Ayça discuss Orhan Bey, praising his bravery. Gündüz Bey suggests a wedding to ensure Kayı unity, proposing Orhan Bey and Elçim Hatun's marriage. Osman Bey must consider this, with Holofira's feelings in mind. Alaeddin Bey attempts to secretly bring the wounded Gonca Hatun to Yenişehir Palace for treatment. Meanwhile, İmren Tegin, who declared war on Osman Bey, intimidates him by bringing the bloodied Bayındır Bey to Yenişehir, vowing that peace will end only with the last Kayi's death. Angered by recent events, Osman Bey declares war, ready to seek revenge on İmren Tegin.

Osman Bey plans to mislead İmren Tegin by pretending to conquer Atranos before marching on Kite. Gündüz Bey and Elçim Hatun join him on this mission. There is curiosity about the developing relationship between Malhun Hatun and Elçim Hatun. Meanwhile, İmren Tegin sets a counter-strategy against Osman Bey, learning Gündüz Bey's desire for Orhan and Elçim's marriage and collaborating with Olivia to prevent it. Olivia is expected to stir trouble in Osman Bey's palace. Osman Bey assembles his army for Kite's conquest, aiming to deceive İmren Tegin and succeed in his plan.

Osman Bey plans to break the Ilkhanate and Crusader alliance. During an attack on Gonca Hatun's caravan, Alaeddin Bey helps her, echoing their past cooperation. Osman Bey discusses Orhan and Elçim's marriage, aiming for a quick resolution, causing reactions from Orhan and Holofira. İmren Tegin plots to kill Elçim to disrupt the marriage, ordering his spy to act. İmren Tegin also kills Uraz Bey, sending his head to Osman Bey as a grim message. Osman Bey's response to İmren Tegin's provocations is awaited.

Osman Bey prepares his army for his ambitious goal, setting a new plan into motion. Elçim Hatun's anger towards Holofira persists, creating tension with Orhan Bey. Mehmet Bey's news from Kütahya causes a problem for Gonca and Alaeddin. Alaeddin proposes marriage to Gonca, awaiting her response. Malhun Hatun, determined to uncover the truth, imprisons Olivia in the dungeon. Orhan Bey plans a significant attack on Olcaytu's caravan, setting a trap. Finally, Osman Bey faces Imren Tegin, setting the stage for a crucial confrontation.

Spring brings victories, as Ramadan and Nevruz coincide. Osman Bey decides to spend Ramadan with his tribe, anticipating what awaits them. Bala Hatun supports Holofira, whose mysterious survival after being poisoned raises questions about her future with Orhan. Alaeddin and Gonca ride together, facing obstacles they must overcome. Osman Bey sets a trap for the Catalan army, seeking their numbers and routes. He plans to use this information strategically. Imren Tegin awaits the Franks, plotting against Osman Bey. Determined, Osman Bey aims to defeat the Frank leader and thwart Imren Tegin's schemes.

The fight between Boran and Konur causes a stir in the tribe, awaiting Osman Bey's decision. Olivia sees this as advantageous and plans to exploit it. Imren Tegin demands Osman Bey's allegiance, but Osman asserts his superiority, leading to rising tensions. Osman has a plan against Imren Tegin, who is also strategizing against him. Ayça Hatun tries to burn Elçim Hatun's dowry, endangering Gazi in the fire. The tribe must determine if Ayça was responsible. Bala Hatun sets out to support Osman Bey against Imren Tegin's move. Holofira arrives at Osman Bey's camp, and Orhan sees her, prompting a conversation. Alaeddin Bey remains committed to Gonca Hatun, despite their challenges.

Osman Bey gathers his people to save Gündüz Bey and plans a strategic move against İmren Tegin. He also acts to save Uç Pazar, raising the Germiyan flag there again, which could impact Germiyan-Kayı relations positively. Osman Bey asks Alaeddin Bey to make a sacrifice for their principality's future, similar to what Orhan has done. Meanwhile, Holofira returns to the tribe after a final farewell, causing potential revelations for Orhan. As İmren Tegin plots against Osman Bey, Osman focuses on conquering Atranos Castle and has captured İmren Tegin, deciding on his fate.

Orhan Bey and Elçim Hatun's wedding preparation excites Osman Bey, who also plans to counter the alliance between Yakup Bey and Candaroğlu. Osman Bey seeks allegiance from the principalities, facing Yakup Bey's competition. A new, dangerous enemy appears in Osman Bey's lands. Melike Hatun and İbrahim Bey attend the wedding, causing tension with Bala Hatun and Malhun Hatun. Ahmet, Gonca Hatun's fiancé, presents gifts, observed by Alaeddin Bey, sparking conflict. Osman Bey urges unity against Yakup Bey and Candaroğlu İbrahim Bey, warning that disunity leads to disaster. The future hangs in the balance amidst these conflicts.

Osman Bey, determined to save his son, devises a plan to end discord, confronting Ulcay directly. Ahmet's death causes tension in the Kayı tribe, with Osman Bey detaining İbrahim Bey and Yakup Bey to prevent further bloodshed. Melike Hatun and İbrahim Bey, angry over their son's death, vow revenge. Meanwhile, Osman Bey and Bala Hatun marry Alaeddin and Gonca, despite their fugitive status. Orhan and Mehmet clash fiercely as Mehmet seeks Alaeddin and Gonca. On another front, Mehmet allies with Ulcay to free Yakup Bey, plotting to overcome the danger posed by Ulcay. Osman Bey faces potential threats while visiting Ahmet's grave.

Osman Bey fights against a trap and confronts Boran, deciding his fate. Melike Hatun returns to the market, seeking revenge on Alaeddin, Gonca, and the Kayı tribe with a surprising method. Gonca Hatun is captured and brought to her father, standing firm against Yakup Bey. Osman Bey works to find Ahmet's killer and clear Alaeddin, suspecting the real killer will target the trial's Kadi. Osman devises a plan to uncover the truth and protect Kadi from Melike Hatun, who wants him dead.

Osman Bey confronts Yakup Bey and İbrahim Bey over the murder of the judge to save Alaeddin. Tensions rise, but Yunus Emre's arrival impacts the hostility. Bala Hatun investigates Ahmet's murder in Uç Pazar, where a witness mentions seeing Ulcay. Ulcay's reaction is awaited. Elçim Hatun and Holofira discuss Holofira's decision to stay in the camp, prompting Elçim's response. While Bala Hatun manages tribe affairs, Osman Bey's absence raises questions as he heads to Bursa. Yakup Bey and İbrahim Bey plot to take Bursa and İznik, aiming to neutralize Osman Bey. Osman Bey's goal in Bursa is uncertain, challenging Yakup Bey and İbrahim Bey's plans. The conflict between the three principalities evolves amidst these tensions.

Osman Bey is determined to capture Mekece Castle, despite opposition from Yakup Bey and İbrahim Bey, who have allied with the Tekfur. Gonca Hatun struggles with the war between Germiyan and Kayı, torn between her love and her ancestral home. Melike Hatun visits Bala Hatun, claiming to unite against enemies, but Bala tests her sincerity due to past agreements with the Tekfurs. Orhan Bey heads to Ulcay's lair, aiming to capture him. Yakup Bey and İbrahim Bey attempt to sway Gündüz Bey to isolate Osman Bey, using a secret advantage. Osman Bey prepares his strategy, ready to confront the two great beys and secure his objectives.

Osman Bey halts trade with Bursa, İznik, and Constantinople and seizes Uç Pazar, challenging Yakup Bey's response. Ulcay, Konur, and Boran escape from the tribe but are blocked by Konstantin Palealagos' men, raising questions about Konstantin's identity. While celebrating their victories, the Kayı tribe's joy is interrupted by news of Gündüz Bey's raid, impacting Elçim Hatun. Bala Hatun exposes a fake judge scheme to İbrahim Bey, threatening to reveal Melike Hatun's secret. Gonca Hatun and Alaeddin Bey face Yakup Bey's anger, leading to rising tension. Osman Bey decides to declare war on Byzantium, prompted by recent events.

Osman Bey ends the war between the principalities and sets his sights on Bursa. The Yoruk tribes begin a great migration, possibly signaling the siege of Bursa. While the Kayı tribe celebrates good news, Elçim Hatun feels uneasy, hinting at underlying tensions. A new treason game is being set up within the Kayı tribe, with Elçim Hatun at the center and possible involvement from Holofira. Amidst this turmoil, an assassination attempt is made on Osman Bey, led by Constantine Palealagos, the Bursa commander responsible for Gündüz Bey's death. The success of this assassination attempt remains uncertain.

Osman Bey faces Commander Constantine, with the survival of Byzantium or the Turkish state at stake. Osman Bey is determined to fight without stopping and makes his first move against Constantine. Mehmet worries about Gonca Hatun's illness, which might thaw their strained relationship. Constantine receives a letter revealing Holofira works for Osman Bey, leading to potential actions against her. A trick is being set up against Elçim Hatun involving Holofira's exposure. Bala Hatun's response will be crucial. Constantine plans to defeat Osman Bey, who must find a way to escape the trap set by Constantine.

Osman Bey takes action to catch Constantine off guard, ultimately confronting him. The end prepared for Constantine is significant. Mehmet Bey's involvement in the plot against Elçim Hatun leads to a showdown with Alaeddin. This marks a critical impasse for the two principalities. Orhan Bey, concerned for Holofira's safety in Bursa, seeks to take her away. Her response to Orhan's request is pivotal. Following Osman Bey's victory over Constantine, Alaeddin and Gonca's wedding takes place amidst celebrations, and Osman sends letters to all principalities. Osman Bey aims to unite all Turks under one flag, inviting the principalities to join him in establishing a state. The response of these principalities will shape the future of their unified cause.

Osman Bey, now leading a state, aims to unify the Turks under his banner, and influence border principalities. Bayhan Bey and his rival Begüm Hatun attend Osman Bey's wedding, possibly revealing intentions towards his daughter, Fatma Hatun. The arrival of the Caliph's vizier Emir Ömer stirs tension, his purpose unknown to Osman. Emir Ömer secretly informs Karesi Bey of the theft of sacred relics, prompting Karesi to seek them out and offer allegiance to Osman Bey. As Osman expands his territory, Byzantine hopes rest on Commander Lucas, who holds the sacred relics and plots against the Turks. Lucas tries to recruit Holofira, impacting her and Orhan Bey’s paths. Alaeddin Bey is imprisoned in a castle as Osman continues his conquests, facing Lucas's schemes.

Despite numerous challenges, Karadin Castle becomes Kayı property. Alaeddin Bey is exposed to danger during the conquest. Commander Lucas devises a plan to find and exploit the weaknesses of Osman Bey and Karesi Bey, aiming to set them against each other. Lucas, holding sacred relics, plans to use them as leverage. Osman Bey's tribe is alarmed when the relics are stolen, and he confronts Lucas. The fight for Karadin Castle ensues with Begüm Hatun and Bayhan Bey vying for control, while Bala Hatun remains disinterested. Holofira, under Lucas's orders, arrives uninvited at the celebration, rekindling her love with Orhan Bey, who proposes marriage. Saruca and Yusuf compete for Fatma Hatun's affection. During Gonca Hatun's difficult childbirth, Begüm and Hazal Hatun clash, with Begüm accusing Hazal of poisoning her.

Osman Bey's pledge to protect the sacred Islamic relics elates the Kayı tribe but fuels Karesi Bey's jealousy. To thwart Osman, Lucas sets a trap in Karadin, complicating Begüm Hatun's situation. After her setback, Begüm plots to undermine Bala Hatun. Meanwhile, it's revealed that Cecilia poisoned Gonca Hatun, straining her relationship with Holofira. Orhan Bey devises a plan to kidnap Holofira from her arranged marriage, but they encounter a trap. Lucas and Karesi plan to financially damage Osman by building a bridge. Osman discovers Karesi's deceit. The unfolding drama sees Gonca's feelings towards Holofira change, and the possibility of Orhan and Holofira's reunion.

Osman Bey's escape angers Lucas and Karesi Bey, who plan a new move against him. During a wedding in Kayı Oba, Lucas incites a Greek rebellion in Söğüt, shocking everyone. Lucas also pressures Karadin Castle, putting Osman Bey in a tight spot as he deals with both threats. Osman Bey escapes a trap, while Orhan Bey and Holofira face danger from Lucas' men. With no obstacles left, Osman Bey plans a grand wedding for Orhan and Holofira. Tensions rise between Gonca Hatun and Holofira due to lingering pain. Begüm and Hazal Hatun notice the strain and may exploit it. Gonca Hatun considers leaving Kayı Oba with Alaeddin Bey. Yusuf and Saruca vie for Fatma Hatun's affection, leading to a showdown between them.

Osman Bey learns that Karesi Bey thwarted Lucas's attempt to capture Karadin, and in gratitude, he gifts Karadin Castle to Karesi Bey. While they haven't formed an alliance, they decide to trade, but Karesi Bey might have a hidden agenda. The Greek Rebellion in Söğüt intensifies, and Osman Bey is determined to restore peace. He plans to destroy the rebellion’s instigators and catch their leader, Arcadeus, by surprise. Sofia, Osman Bey’s longtime enemy, returns and teams up with Lucas, swearing revenge. She severely injures Baysungur, who reaches Osman Bey covered in blood. Osman Bey is now focused on avenging Baysungur. In the Kayı Obası, tension persists between Gonca Hatun and Holofira, with Hazal and Begüm Hatun taking sides. Bala Hatun must address this issue, and her warnings to her daughters-in-law will have significant effects. The tension between Begüm and Bala Hatun also escalates, causing further strife.

Osman Bey plans to strike a significant blow to Byzantium and Karesi Bey by conquering Akhisar. Meanwhile, Karesi Bey declares martial law in Karadin, aiming to solidify his control. As Osman Bey focuses on his conquest, Bala Hatun takes charge of maintaining internal peace, aware of the tension between Gonca and Holofira. Begüm Hatun seeks to intensify this discord. Sofia, determined to cause chaos, kidnaps Fatma. The abduction of Fatma, Saruca, and Yusuf shocks Söğüt Pazar. Bala Hatun, upon hearing the news, immediately pursues them to bring Fatma back.

Before avenging Baysungur's martyrdom, the kidnapping of Fatma Hatun, Saruca, and Yusuf by Lucas and Sofia deeply disturbs the Turks on the fringes. Osman Bey faces a dilemma as Lucas and Sofia demand Söğüt in exchange for Fatma, putting Osman Bey in a challenging position. He decides to surrender Söğüt but has a larger plan in mind to save Fatma without losing Söğüt. Karesi Bey declares war on Osman Bey, seeing him as vulnerable after the kidnapping. Karesi Bey aligns with Gencer Bey to strike Osman Bey. Lucas uses Yusuf and Saruca to extract information about Osman Bey’s plans, testing the loyalty of Begüm Hatun and Bayhan Bey. They are challenged to either betray Osman Bey to save their loved ones or remain loyal to him. Orhan and Alaeddin risk their lives to save Fatma amidst the unfolding tensions and conflicts.

Sofia plans to take revenge on the Kayis by drawing them into a deadly trap, putting Bala Hatun at risk of becoming a martyr. The fate of Gonca Hatun and Holofira is uncertain as they fall into Sofia's scheme. Lucas realizes there's a traitor causing their defeats and plans to uncover this person. Ilbay, now exposed, faces the threat of martyrdom at Lucas's hands. Boran and Cerkutay blame Begüm Hatun and Yusuf for their troubles and are disturbed by Begüm's presence at the council. Begüm uses her market duty to escalate tensions between Gonca and Holofira, prompting Bala Hatun to take action against her. Gonca Hatun, upon learning of Begüm Hatun's love for Osman Bey, must decide how to handle this sensitive information.

Osman Bey prepares to hold accountable those who attacked Bala Hatun and his family. Sofia, who kidnapped Osman Bey's daughter Halime years ago and raised her as an enemy, sets a trap involving Halime. Poena, unknowingly attacking her sister Fatma at Söğüt Market, adds to the tension. Osman Bey suspects Gencer, Begüm, or Bayhan as traitors collaborating with Lucas, Sofia, and Karesi. He closely monitors them. Learning about Begüm Hatun's meeting with Karesi Bey, Osman Bey imprisons her. Begüm escapes and seeks refuge with Karesi Bey, who proposes to her. Osman Bey tracks down Begüm's kidnapper and confronts Karesi Bey, resulting in bloodshed. Osman Bey plans to protect his family from Lucas and Sofia's threats, determined to exact revenge.

Osman Bey, wounded by an arrow shot by Poena (Halime) while seeking what Sofia hid in a monastery, remains determined to defeat Sofia and Lucas despite his injury. Sofia and Lucas must devise an escape plan while dealing with Poena. In the Kayı Tribe, Sofia plans to use Poena (Halime) to end Osman Bey and Bala Hatun, requiring Poena's infiltration into the camp. Bala Hatun, grieving her lost child, visits Halime's grave, where Poena attempts to kill her. Karesi Bey declares war on Osman Bey, with Lucas joining him. Begüm Hatun informs Osman Bey of Karesi Bey's plans, risking her life if Karesi Bey discovers her betrayal. Sofia and Lucas's attack on Osman Bey's headquarters targets Bayhan Bey, potentially making him a martyr, which would significantly impact the upcoming war. Osman Bey must confront Karesi Bey's alliances and fight alone against their combined forces, navigating these numerous threats and conflicts.

Osman Bey besieges Akhisar Castle, battling both the Mongols, who destroy Turkish tribes, and Sofia, who plots revenge. The Mongol envoy demands taxes from Osman Bey, which he refuses, angering the ambassador and leading to massacres. Osman Bey, undeterred, targets Akhisar, facing the Mongol threat and Sofia's new traps. Lucas and Sofia plot to stop him, while Poena provides Sofia with camp information. Key challenges include Bala Hatun's response to the Mongol envoy, Osman Bey's strategy for Akhisar, preventing massacres, and handling Sofia's schemes. The outcome hinges on Osman Bey's leadership and tactical decisions.

The Mongol Commander Ulugan arrives at the Kayı Tribe to challenge Osman Bey, intending to destroy his reputation and life. Osman Bey must decide how to respond to Ulugan's threat and plan. Meanwhile, the Mongols capture and brutally torture Prince Orhan in Karacahisar. Osman Bey faces the challenge of rescuing his son amidst this brutality. A poison spreads through the tribe, endangering lives, including Poena's. Alaeddin Bey searches for an antidote, while Bala Hatun fears losing Poena, not knowing she is her daughter Halime. Osman Bey increases precautions against the Mongols, and Ilbay plans to counter these measures, aiming to thwart Osman Bey's defenses. The tribe faces multiple threats, testing their resilience and leadership.

Ulugan's poison devastates Osman Bey's lands. Osman Bey sacrifices himself to save his people, surrendering to Ulugan. In captivity, he's paraded as a trophy, but his spirit remains unbroken. Within the Kayı tribe, Bala Hatun confronts Begüm Hatun, who spreads discord due to her love for Osman Bey. Meanwhile, Ilbay's betrayal is countered by an unexpected move from Begüm Hatun. Orhan Bey is saved from execution and now must rescue Osman Bey. Amidst chaos, Holofira reveals her pregnancy to Bala Hatun, offering a glimmer of hope. However, a raid by Ulugan's forces threatens their joy. Will Holofira share the good news with Orhan Bey?