An aging gangster, Fernand Naudin is hoping for a quiet retirement when he suddenly inherits a fortune from an old friend, a former gangster supremo known as the Mexican. If he is ambivalent about his new found wealth, Fernand is positively nonplussed to discover that he has also inherited his benefactor’s daughter, Patricia. Unfortunately, not only does Fernand have to put up with the thoroughly modern Patricia and her nauseating boyfriend, but he also had to contend with the Mexican’s trigger-happy former employees, who are determined to make a claim.
| Camera | Maurice Fellous | Director of Photography |
| Sound | Daniel Brisseau | Sound Engineer |
| Sound | Michel Magne | Original Music Composer |
| Production | Alain Poiré | Producer |
| Production | Robert Sussfeld | Producer |
| Production | Irénée Leriche | Producer |
| Writing | Georges Lautner | Dialogue |
| Art | Jean Mandaroux | Set Decoration |
| Editing | Michelle David | Editor |
| Writing | Albert Simonin | Novel |
| Directing | Georges Lautner | Director |
| Art | Jacques D'Ovidio | Set Decoration |
| Sound | Antoine Archimbaud | Sound Engineer |
| Writing | Michel Audiard | Writer |
