In season 3, Hakan enters into a fierce battle to save Istanbul from returning to hell by his brother, who carries the blood of "The Protector". While the city suffers from a fatal virus, Faysal and Ruya are getting closer to their evil plans. Hakan has to reach Nisan to find an antidote and on this path Burak joins Hakan on this adventure to save the citizens of the city. Trying to survive against all this, Hakan must also find Vezir, the infamous immortal, the rebel, who is getting ready to conquer Istanbul with a fury of six hundred years. The history of Hakan's ancestors sheds a light to his battle today and he gets ready for his journey between the past and the present.