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.