Pilot Captain Salih Ekrem is a young air officer and one of the first Ottoman pilots.

Cemil is a feisty young man from Trabzon who played for Trabzonspor in the mid-1990s. He transferred to Beşiktaş during the same period and changed greatly in character after moving to Istanbul. During a Beşiktaş-Trabzonspor match, he scored three goals against his former team, Trabzonspor, and then did three somersaults, earning him the nickname "Somersaulting Cemil" and turning all his old friends and fellow Trabzon natives against him. He left his fiancée Zeynep and settled in Istanbul, never returning to his hometown for 20 years. Now in his 40s, Cemil is forced to return to Trabzon when he hears that his father has had a heart attack. However, he is too late—his father has already passed away. He wants to return to Istanbul immediately after the funeral, but he is forced to change his mind after hearing the words of his closest friend, Kemal.

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 illness and a trauma he experienced in her childhood cause Tuna to experience complex psychoses. Tuna struggles with the strange games his mind plays on him, while trying to live the love he feels in his heart. He will also have to struggle with Berkin, whose presence turns her into a troubled friend.