Arms dealer Yolaf Peterson aims to make a sale to guerilla Mongo, but the money is locked in a bank safe, the combination known only to Professor Xantos, a prisoner of the Americans. Yolaf agrees to free Xantos, accompanied by reluctant guerilla Basco, but a former business partner of Yolaf's- John 'The Wooden Hand', has other ideas.

Imagine, if you will, a somewhat contented married woman finding out her husband's infidelity during the celebration of a birthday party. That is what happens to Marie-France, when her husband, Henri, pulls out panties from his pocket to be used as a handkerchief. Marie-France becomes furious, storming out of the house. His son, Sebastian and his wife, Clementine, a struggling couple, decide to take Marie-France to their tiny apartment, something they feel it is a temporary arrangement. Little did they know what they were getting into...

A mild-mannered professor moonlighting as a fake hit man in police stings ignites a chain reaction of trouble when he falls for a potential client.