A brilliant swindler, Olivier Parker, hires a small-time pipe salesman, Amédée, to swindle a naive provincial, Ferdinand Galiveau, a chicken merchant. Renamed Teddy Morton and now a jockey, Amédée must ride a mare on which Ferdinand, advised by Parker, must bet. Absolutely convinced of his mystification, Parker bets on an oddball who, of course, loses, while at the last minute Galiveau, having bet on an outsider, wins a fortune. All Parker has to do is find another sucker.
| Directing | Norbert Carbonnaux | Director |
| Writing | Norbert Carbonnaux | Adaptation |
| Sound | Jean Prodromidès | Music |
| Production | Jean-Paul Guibert | Producer |
| Camera | Roger Dormoy | Director of Photography |
| Editing | Jacqueline Thiédot | Editor |
| Art | Jacques Colombier | Production Design |
| Production | André Cultet | Production Manager |
| Production | Éric Geiger | Unit Production Manager |
| Directing | Jacques Deray | Assistant Director |
| Directing | Georges Lautner | Assistant Director |
| Art | Robert Guisgand | Assistant Production Design |
| Art | Roger Joint | Set Dresser |
| Costume & Make-Up | Marcel Bordenave | Makeup Artist |
| Sound | Jean-Claude Marchetti | Sound Engineer |
| Camera | René Ribault | Camera Operator |
| Editing | Colette Charbonneau | Assistant Editor |
| Writing | Michel Audiard | Writer |
| Writing | Albert Simonin | Writer |