Overview: A youth company sits on the beach. A drunk girl drank to go swimming, one of the young people follows her. Years pass by. Marina returns ahead of time from vacation and finds in the apartment a film on which a naked girl is photographed. Her husband - Alexander Strelnikov - says that this is a cassette of a friend. Marina does not believe and hires a private detective to follow his wife. In Strelnikov personal account box, where the correspondence comes with letters and photographs of girls, whom he then appoints. Korotkov in a trolleybus gets acquainted with the girl Mila. Later that one is strangled. Next to the body is a picture of a man. Korotkov learns in the killed his fellow traveler. Dotsenko finds out that the name of the person in the photo is Strelnikov. Strelnikov gets a photo with an inscription ...