Based on the novel of the same name by Daniil Granin. Engineer Chizhegov often travels on business to a small town, where he meets a woman who reciprocates his feelings. The protagonist faces a difficult problem: he is married, and his family lives in Leningrad. Unable to make a final decision and afraid of losing his beloved, he commits a despicable act. His remorse comes too late—Chizhegov loses the woman who was truly dear to him forever.

Schoolboy Vasya and his little sister Klasha live on the shore of a picturesque lake, in which trout are bred. With the help of their friends, the dogs of the Quiver and the horse Strelka, the guys detain the poachers.

The action takes place during perestroika in one of the old Moscow houses on the Arbat, intended for demolition. The tenants have long been evicted, and only 80-year-old Vera Vasilievna does not want to leave, claiming that Yesenin, Mayakovsky, Bulgakov have been in this house ...