Isabel is a young Catalan woman from a conventional family. She makes her living cleaning - in a pizza factory at night, and in the home of a middle-aged writer during the day. But she's hiding a secret life: one filled with multiple sexual partners and dangerous erotic encounters. When she goes to clean the writer's house, she gradually begins to tell him more about this side of her, until he becomes the confidant to her very darkest secrets. She trusts him - he is the only man she knows who does not try to sleep with her. But as their relationship develops, she becomes more dependent on his advice and understanding, eventually revealing the complicated sadnesses that drive her reckless behaviour.