Alexandra Melikhova is a young police officer working in the “robbery department”. She is preparing for the wedding, but a few days before this event, her father, Colonel Melikhov, who headed the criminal investigation department, is killed. Melikhov was killed from his own pistol, but the killer took the weapon with him. At the same time, a gang arrives in the city, which intends to rob several jewelry stores. Colonel Melikhov’s pistol turns out to be with them, and in the meantime, the investigation believes that Alexandra’s father was connected with the crime and one of his accomplices killed him. Alexandra does not believe in this - she infiltrates the gang, meeting the driver Andrei and introducing himself as an employee of a large jewelry store ...