Serdar, who suffers from the biggest shock of his life due to his beloved Ceren being a traitor, is questioned by internal affairs while thinking about how he came to this game. After the plane crash, with the official announcement of the death of the members of the team, the families go to Mete's side. While Mete gives the bitter news to families, team members who cannot communicate with their families. Serdar, who came out of the internal affairs inquiry, has to continue his relationship with Ceren on the instructions of Mete. While the team works hard to track down Pascal, who organized the SİHA attack, Serdar, who came to the secret headquarters, meets the team members. Upon the information that Pascal will flee abroad, the team takes action for their first operation. Vowing not to leave the blood of the martyred engineers on the ground, the team is determined to catch Pascal and reach the dark structure behind him.