Ex-gangster Fernand (Lino Ventura) receives a call from a dying friend, a mob boss nicknamed "The Mexican". The doomed mobster talks Fernand into taking care of some criminal business and looking after his soon-to-be-married daughter. When a longtime mobster heavy, Volfoni takes exception to Fernand for being an outsider, they come after Fernand who is equal to the task. He defends himself in a series of comical killings from the onslaught of the mob.—Anonymous
A dying mob boss hands over his business to an old friend, Fernand. The boss' assistants want to get rid of the latter. But are the Volfoni brothers and Théo real threats? Ensuing fights and shootouts are more comical than deadly.