Film Noir. Hubert and Ewa have been married for five years, there is a big age difference between them.

Ewa starts an affair with a younger man, and her husband becomes suspicious and hires a detective to follow her and provide the evidence of adultery. With the help of her lover, Ewa implements a clever plan to get rid of the detective who intends to blackmail her. At the same time, she tries to frame her husband for murder and take over his property.