In this argumentative, fractious drama about a warped sense of male-female love, Bruno (Jacques Bonnafe) who is clearly not playing with a full deck, devises a means to test the love of his girlfriend Isabelle (Ann Gisel Glass). Since Isabelle had been in love with Alain (Xavier Deluc) in the past, Bruno invites Alain to a surprise birthday party for her at a hotel -- what better way to judge her feelings than to get them together? Alain arrives with his current girlfriend Lio (Fanny Bastien) to find that the "party" is only a foursome. Soon after the two couples start the evening off, their polite exteriors deteriorate as they bicker on, and on, and on.