Hakan struggles to choose between his new love and his duties as the Protector. After sending Emir back home, Kemal heads out in search of the dagger.
Hakan's new job begins at a party celebrating Faysal Erdem's big win with the Hagia Sophia project. Meanwhile, Zeynep follows clues to find the stone.
While Hakan visits the Princes' Islands to learn about his past, Zeynep and Kemal head to the Mausoleum of Mimar Sinan to look for the stone.
Zeynep enlists Leyla's help in pinpointing the Immortals' target for the attack. Faysal goes after Hakan as Rüya's condition deteriorates.
After deciphering Okhan's note, Hakan scrambles to foil a sinister scheme against the Sultan — with unexpected consequences.
Hakan finds a link between the museum robbery and the Immortals' lethal plan. Struggling under Faysal's influence, Leyla puts Hakan in danger.
Hakan and the Loyal Ones hatch a scheme to gain Rüya's allegiance. Vizier demands Faysal's help in retrieving the last piece of the key.
Vizier, the mysterious leader of the Immortals, curbs Rüya's ambitions and lures Hakan into a trap using Levent. Faysal makes a vindictive decision.
Amid a search for the potion in the past, Hakan overhears details of a fatal plot against Vizier. The Oracle reveals to Zeynep a cryptic prophecy.
The Oracle shares an ominous vision, Hakan visits the past, and Zeynep overhears Vizier confronting Rüya about the key.
Faysal publicly implicates Hakan in the Hagia Sophia incident. A grief-stricken Zeynep confronts Derya and learns about an imminent attack in the city.
Zeynep and Hakan race against time to find Nisan, a chemist who’s their only hope for a cure. A shadow from the past returns.
Back in the past, Hakan steals an item from Vizier and encounters a familiar face. Zeynep sets out to prove her loyalty to the Immortals.