"Can you ever control another person's sexuality?"
Paris doctor Catherine starts to think her husband, Bernard, is having an affair when she hears an unfamiliar woman's message on his voice mail. Hoping to learn more about his extramarital activities, Catherine heads to a strip club, where she hires call girl Nathalie to have a fling with Gerard. As the affair progresses, Nathalie gives Catherine regular status reports, and the relationship between the women evolves from business to personal.
Catherine

Nathalie / Marlène

Bernard

François

Catherine's Mother

The son

The boss of the bar

Catherine's patient

Ghislaine

Marianne
Ingrid

The medical secretary
Another patient
The real estate agent

The client

L'homme d'un soir