Philippe Clarence, a famous Parisian dressmaker, seduces his friend's fiancee. But, for the first time in his life, this is for real. The film is also a sharp picture of the fashion world.

Chérie is a beautiful young woman who works as an escort girl. She meets a young and wealthy man who propose her to be his fictional wife so that his mother won't bother him anymore with this other girl, a rich one, she wants to see her son married to.

Alex Grégoire is a timid insurance company clerk who shares his uneventful life between his wife Angèle, his colleagues and his passion for crosswords. But all of a sudden his existence changes dramatically. First because he wins a crossword competition. Second because a jewel thief, Charles Tuffal, thinks he recognizes in him a former accomplice. From that moment "uneventful" is not the best adjective to qualify Alex's life anymore...