One sunny Sunday in St. Petersburg, Russia, three special agents, while enjoying a day off together; receive an emergency call to arrest Kardava, a renown boss of the Russian mafia. During the arrest all three agents and the mafia boss are suddenly shot by a sniper, who was hired by an unknown force. The sniper is sure that he killed all agents and the boss. But agent Anton Chelyshev (Domogarov) survives a shot to the head, and he remains the only one who knows the sniper`s face. As time goes by, the official law enforcement machine has the wrong man sentenced, but the real sniper is at large and dangerous. Now Anton Chelyshev is labeled as crazy by his family and colleagues, but he does not give up his private investigation.