In front of private detective Tatyana Ivanova, her friend, police captain Andrei Melnikov, was wounded by a machine gun burst at the entrance to the casino. What is this - an accident or revenge? Or maybe in this way the bandits are trying to cover up their tracks - recently, in a car explosion, the commercial director of a very suspicious company, whose activities the police became interested in, was killed. Tatyana immediately gets involved in the investigation and, together with her fellow operatives, follows the criminals literally on their heels. Even new explosions and assassination attempts cannot stop her on this thorny path...