Nadya and Roman had just begun a happy family life: pleasant home, beloved work, mutual understanding. Measured everyday life of a couple in love went its course, but the idyll was cut short when Nadia's mother broke into their lives, who had abandoned her 20 years before. Wanting to test her son-in-law's fidelity, Valentina gets into his bed. The consequences of such a rash act do not last long. Will it be possible to avoid a terrible tragedy in the family? Will Nadya forgive her mother? Will the newlyweds return to a happy life?