An old count hides just before he dies to annoy his heirs. The heirs search a manor for the count's body and are killed off one by one. Jean-Marie, his fiancée Micheline, and Edwige investigate the deaths and search for the count's body.
| Directing | Georges Franju | Director |
| Writing | Georges Franju | Writer |
| Writing | Robert Thomas | Writer |
| Writing | Pierre Boileau | Writer |
| Writing | Thomas Narcejac | Writer |
| Sound | Maurice Jarre | Original Music Composer |
| Editing | Gilbert Natot | Editor |
| Camera | Marcel Fradetal | Director of Photography |
| Art | Roger Briaucourt | Production Design |
| Camera | Henri Champion | Second Assistant Camera |
| Production | Jules Borkon | Producer |
| Costume & Make-Up | Lorène | Costume Design |
| Costume & Make-Up | Billy Bonnard | Makeup Artist |
| Sound | Robert Biard | Sound |
| Art | Albert Volper | Set Decoration |