Insurance executive Charles suspects his wife Hélène of playing the field, so he has a private detective locate his wife's lover, author Victor Pegala.
| Production | André Génovès | Producer |
| Writing | Claude Chabrol | Screenplay |
| Editing | Jacques Gaillard | Editor |
| Directing | Claude Chabrol | Director |
| Sound | Pierre Jansen | Original Music Composer |
| Camera | Jean Rabier | Director of Photography |
