Pierre Renard is the blackboy of the writer George Vallier. At the time of a reception, the Italian actor Aldo Barazutti takes him for the writer and proposes to him to come to work with him in Tunisia with the development of a scenario. In fact Barazutti wants only to flee her wife to find her mistress Valerie. Misunderstandings when Vallier joined them. They must flee in the desert a jealous husband...

Charles and Jeanne Renard live with their young kids in a dormitory town. Everyday train and metro,work and return by train and metro to the dormitory town (the famous french sentence "Métro,boulot,dodo"). But how fragile is marital bliss ?