Tuna is going through hard times due to the psychological illness he suffers from. He tries to cope with the problems he faces with the support of his best friend Berkin. Meanwhile, Tuna begins to develop an emotional connection with Selen, his neighbor and college friend. This unexpected romance causes the strong friendship between Berkin and Tuna to break down. The serial murders that begin to take place around him drag Tuna towards a dangerous process. Developments that negatively trigger her...