At a party with friends, 20-year-old student Khrystyna meets Ivan, a graduate student at her institute. Christina invited her husband home ... In the morning Ivan meets Christina's mother Nadezhda. He expects to hear a hail of reproaches addressed to him, but the woman calmly reacted to the unexpected guest, and even offered him ... to drink coffee. Nadezhda Pavlovna's behavior impresses the young man. He meets Christina twice more, but it becomes clear that the object of his attention is the girl's mother…