Most of the film is a flashback from failed suicide Marie-Madeleine’s hospital bed.
Marie-Madeleine (Corrine Lemoine) is an assistant in a lingerie shop where the manager charges male customers to view the ladies’ changing rooms through a two-way mirror. Another assistant, Mandarine, is not averse to putting on a lesbian show with female customers, but Marie-Madeleine objects strongly when a male customer tries it on with her. However, she later meets Richard Lemieuvre in a bar and has a one-night stand with him. She wakes up alone to find some bank notes on her dressing table.
One of her customers had been a prostitute and she later meets her in a café. She admits to having been glad of the money and her former customer introduces her to a madame. She is then drawn into the life of a prostitute, though she has feelings of guilt about this career, especially as she receives little respect from her clients. This culminates in her attendance at a sex party with Richard Lemieuvre who reveals that she is a prostitute and where she is then gang-.
Hence she ends up with bandaged wrists in a hospital bed, but the words of her doctor seem to give her a more optimistic outlook.