A young Parisian advertising executive becomes so captivated by the unsettling charm of his mysterious new employer that he eventually abandons his family and friends, viewing it a privilege to let the ubiquitous employer take over his home, his life, his desire. Only his wife remains suspicious, recognizing both the pathos and the evil in the man’s soul-stealing power.
| Directing | Pierre Granier-Deferre | Director |
| Writing | Pierre Granier-Deferre | Screenplay |
| Writing | Christopher Frank | Screenplay |
| Camera | Étienne Becker | Director of Photography |
| Sound | Philippe Sarde | Original Music Composer |
| Production | Dominique Besnehard | Casting |
| Production | Alain Sarde | Producer |
| Editing | Isabel García de Herreros | Editor |