In Moscow, on the front line, an organization of traitors operates under the command of the Redhead. He has subordinated experienced criminals and carries out assignments for the enemy intelligence service, creating a criminal atmosphere—pursuing scientists and sending signals to enemy bombers. Captain Maksimov is ordered to detain the bandits, and after a long search they manage to catch several of the Redhead’s accomplices. Their testimonies shock Maksimov, because it turns out that all this time the criminals had been acting very close to him.