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, 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.

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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 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 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.

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.

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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.

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 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.

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.

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.

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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.

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.

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 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.

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.