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.

A triangle: love, obsession, and choice. Pierre, a ladies' man who has little cash and no fixed residence, describes his best friend Benoît as the world's oldest 32-year-old. The shy, well-employed Benoît's life changes when he answers the personal ad of Marie, a 25-year-old who restores paintings. He's attracted to her and she likes his steady calm and his honest attention. They're soon a couple, and they include Pierre in their dinners, outings, and trips. What will happen when Pierre realizes that he too is in love with Marie?