Call girl, Monique Caron, wants to quit the profession. In Rome, a fortuitous exchange of suitcases leads her to meet Antoine Dubois, a somewhat blundering private detective. With his suitcase full of cassocks, she mistakes him for a Vatican client but after sex, Antoine whispers his real job. They tell each other about their sexual adventures that have taken place across Europe.

Two spouses, whose marriage is shipwrecked, recall during a last meeting, scenes and episodes of their life as a couple.