Une leçon d'amour.

Marc, who works for a soundproofing company, and Sylvie, who runs a temp agency, have been married for several years. Still in love with his wife, Marc nevertheless cheats on her with Vanessa, a 25-year-old woman, telling her that his wife is dying. One day, Vanessa, who is looking for a job, happens to walk into Sylvie's temp agency.