A widower confuses the door and accidentally comes to the house of a lady bored of her lover.

Teresa is an attractive 30-year-old doctor. She divides her stable life between work, caring for her younger sister Ania, a high school student, and her romance with Jan, a well-off lawyer who wants to marry her. However, Teresa postpones her decision to marry until Ania becomes independent. One day, she unexpectedly meets Tomek, a young photographer, who soon confesses his love to her, making her question her loyalty to Jan.

After the war, Stefan cannot go back to a normal life.

A Polish counterintelligence officer infiltrates a spy network in Munich.