He worked in the Anti-Terrorism Unit of Ankara for many years . He was always headstrong, tough and was a legend in his department. As a result of his personality, he has made countless enemies. At every opportunity, he prevented the operations of illegal organizations. The greatest supporter of Sahin was his friend from Academy, Akin. An illegal organization troubled by his operations and infiltrated into security chief office killed Akin. Their plan was to make Sahin accused with the murder of Akin. While he was being taken to prison to be executed, he was rescued by Demir and joined Zula.