With Abdurrahman's life on the line, Ertuğrul goes after a traitor.Hayme helps mend fences between Ertuğrul and Gündoğdu. With Üstadı Azam in grave condition, Thomas gains the upper hand.Kurdoğlu's judgment day arrives, but Thomas still has one advantage over the Kayı tribe. There, he sees the preparations to poison the Sultan and realizes that Emir Saadettin is behind this. Noyan chases him. As leadership changes in the camp, Tuğtekin refuses to give up on the power game.Ertuğrul grows suspicious of Noyan's true intentions toward Abdurrahman.

Emir Saadettin is called to Konya.Ertugrul Bey prepares to conquer Karacahisar Castle. Ertugrul Bey rescues Ares and this event affects him deeply. In Dirilis Ertugrul Season 4, But while Kayis rejoices, the unexpected death of Halime Hatun will upset everyone.

But during this time a man of Emir Saadettin poisoned the Sultan’s food. Vasilius waits for the right time to strike.Halime becomes suspicious of mysterious visitors claiming to be merchants. Ertuğrul sends a package to Karacahisar that turns Vasilius against Ural.Ertuğrul expresses concerns to Dündar about his relationship with Günyeli, who gets wind of Dündar's secret mission to Konya.Amid a scheme to help Teo escape, Aliyar asks Kutluca to closely watch Acar. Aslihan goes to the palace to kill Emir Saadettin and injures him heavily. Batuhan switches sides, and Petrus helps Ural avoid a death sentence.Pending the selection of the Çavdar chief, Saadettin Köpek convinces Ertuğrul to pardon Ural and maintain peace between the two clans.Ertuğrul negotiates with Saadettin Köpek to ensure Aliyar becomes the Çavdar chief, but Saadettin Köpek makes Aslıhan a conflicting promise.Aslıhan confronts Batuhan, who's determined to tell her the truth about Saadettin Köpek. Osman must have a mother, but there is no one who can do it. Artuk Bey (otherwise called "Child of Eksük" or Ibn Eksuk) was a Turkish General of the Great Seljuk Empire in the eleventh century.

Ares considers making Bahadır a potential ally against Ertuğrul.Alfonso ingratiates himself with Niko as Ertuğrul prepares for an ambush against Ares's men. Aytolun grows desperate to stop Korkut Bey from acting on a rash decision against the Kayı clan.An orchestrated riot concludes unexpectedly when a visitor's sudden arrival at the camp leads to bloodshed.Ertuğrul brings news that may give the Kayı clan a second chance. Ertugrul Bey says that he will release Ares in exchange for telling the Sultan what he knows. There is no longer any obstacle for Ertugrul Bey to conquer the castle. Ares is now a Muslim.The Kayi and Cavdar tribes cannot agree to emigrate to Sogut. Ertuğrul catches Noyan unawares.Ertuğrul makes a controversial decision that pits him against Turgut. Kurdoğlu makes a deal with Kara Toygar.On the way to Aleppo, a dangerous enemy crosses paths with Ertuğrul. Turns out Marya is a spy. Halime's pursuer catches her and Deli Demir unawares.Ertuğrul's day of reckoning is imminent. Ogedei Khan asked Ertugrul Bey to become the Seljuk Sultan, but after this proposal, Ogedei Khan passed away. Boğaç Alp and Doruk Bey outnumber Ertuğrul, but underestimate his abilities.Ertuğrul and his warriors advance into unfamiliar territory, confronting the Çavdar clan, forging new alliances and reckoning with subversion within.Before fulfilling Sultan Alaeddin's orders, Ertuğrul must find a spy at Hanlı Market.

Ertugrul Bey does not like this decision, but there is nothing he can do. Ares is now free, but Emir Saadettin wants to kill him. Helena accepts Vasilius's proposal -- under one condition.Ertuğrul and his men trace Aslıhan's whereabouts. Ertuğrul prepares to fight fire with fire and makes another decision that may pit him against Gündoğdu.Goncagül pulls the wool over Gündoğdu's eyes and puts Selcan in a helpless position, but Ertuğrul has a hidden plan to expose the real killers.Artuk Bey helps Ertuğrul ensnare their enemies as Gümüştekin and Aytolun prepare to realize their ultimate plan.After Selcan and Banu Çiçek's meeting, Goncagül and Aytolun scramble to cover their tracks. Turgut and Aslihan will get married, but Emir Saadettin will poison them. Meanwhile, Dundar Bey’s decisions made the situation even worse. Ertugrul was sent as an envoy to Ogedei Khan by Sultan Giyaseddin. Ibn Arabi comes to the palace and changes the decision of Sultan Giyaseddin. Atsiz, sent by white beards, comes and saves Ertugrul Bey. Commander Titus and Üstadı Azam build a new army.Kara Toygar threatens the Kayı camp when Süleyman Shah refuses to turn over the prisoners. The Knights Templar's lethal weapon strikes the Kayı tribe on the eve of their migration.Şahabettin is key to Ertuğrul's plan, but El Aziz stands in the way.