Successful but lonely Maria and her adult son are already sharing their apartment with irritation. Having accepted a marriage proposal from Mikhail, who is courting her, Maria hopes to build personal happiness for the first time in many years and moves in with her lover. Her hopes for a family idyll are dashed by the man's adult son, who has returned to settle scores with his father. And Mikhail turns out to be completely different from the man he pretends to be. Taking a forced step into conscious solitude, Maria, for the first time, chooses the most important person in her life—herself.