Family of Slootsky is separated for a whole summer. The main heroine Varvara Ivanovna Slootsky doesn't want to stay alone in the stuffy big city, so she decides to spend vacation in her native town on Volga river, where has been working as a teacher. Particularly she has promised to visit her friends and students. Her granddaughter Lisa accompanies Varvara, her parents had gone to London but she didn't want to part with Murik and "lost" her passport. Soon Lisa will meet her old company which she used to be in friendly terms during previous vacations with grandmother. Children grew up and had non-childish interests and Varvara Ivanovna will have full taste of hard education of granddaughter who got into "bad" company... Meanwhile some suspicious incidents happen in the town and Varvara plugs again into detection. She has lots of assistants. All her former students and colleagues are ready to participate in Varvara's detection with pleasure. And the first case is much more difficult that seems at first sight...
