The film follows the story of three girls in contemporary Paris. One searches for her lost mother since she knows she's adopted. The other has come out of a coma and needs to have a love relationship aside from his mysterious father. The third one is a crook who redeems herself through love. The action is commented by songs and dance routines.

影片讲四个同住一间宿舍的女大学生，都是学习表演的学生，她们的作业是学习一部名叫《双重不忠》的剧本，结果剧中情节对她们的真实生活产生奇妙的影响，尤其是她们如何处理爱情、性欲、信任、背叛、犯罪、艺术等人生课题。