It is never too late for a child!
André and Laurence are a childless couple living in the quiet suburbs of Paris. They lead a quiet and rather boring life. One day they discover an uninvited guest in their home - a strange freak who tells them that he is their son. André, believing that they fell victim to a mistake or confusion, did not want to have anything to do with him. Laurence, in the face of something so inexplicable, suddenly becomes a mother that she has never been and receives with open arms her found son, as well as his wife and dog ... Civil war is inevitable.