A group of people find themselves stuck in remote train station in German-occupied Poland. A drunk German station guard there gets paranoid and sees partisans all around him, phones headquarters, and when the German soldiers arrive and search the station they find a gun. They then threaten to execute every fifth person unless someone claims it.
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.
The young and beautiful wife of a prominent diplomat complains of boredom. To change her monotonous life, she has an affair, through which she gets entangled in intrigues and espionage affairs.
