A child named Tayfun, who has been missing for a while, is found dead. Seyfi and Nuri Pamir begin to investigate the murder. This investigation leads them to Abbas Bey, one of the richest men in the city, and his daughter Dilara.
Since the murder was committed out of revenge, Sabahattin comes to Seyfi and Nuri Pamir's mind. They question him about the murder. Seyfi's wife Müesser comes to town.
Sabahattin calls a number before he dies. The police identify the number and it turns out to be Tamer's number. Seyfi and Nuri Pamir talk to Dilara. She denies it at first but then tells them the truth.
With the new bodies found, it becomes clear that there has been a child killer in the city for years - Nuri Pamir continues to believe that Abbas is responsible for these murders.
Fikret calls Abbas and threatens him. The police chief removes Nuri Pamir and Seyfi from the investigation, but Seyfi finds a clue that could lead them to the killer.