A private detective and a girl obsessed with thriller novels investigate the murder of a rich entrepreneur.
| Directing | Sergio Grieco | Director |
| Writing | Mario Amendola | Story |
| Writing | Ruggero Maccari | Story |
| Writing | Mario Amendola | Screenplay |
| Writing | Ruggero Maccari | Screenplay |
| Writing | Ettore Scola | Screenplay |
| Writing | Carlo Veo | Screenplay |
| Art | Franco Lolli | Production Design |
| Camera | Guglielmo Garroni | Camera Operator |
| Camera | Mario Capriotti | Assistant Camera |
| Costume & Make-Up | Euclide Santoli | Makeup Artist |
| Sound | Ovidio Del Grande | Sound |
| Costume & Make-Up | Adriana Berselli | Costume Design |
| Editing | Antonietta Zita | Editor |
| Directing | Maria Parenti | Script Supervisor |
| Directing | Mario Caiano | Second Assistant Director |
| Directing | Fabio De Agostini | First Assistant Director |
| Camera | Gábor Pogány | Director of Photography |
| Production | Domenico Bologna | Production Manager |
| Production | Mario Damiani | Production Manager |
| Production | Luigi Pinini | Unit Manager |
| Production | Gino Fanano | Production Secretary |
| Production | Luciano Momi | Production Secretary |
| Sound | Tito Salesi | Original Music Composer |
| Sound | Pippo Barzizza | Conductor |
| Production | Carlo Caiano | Producer |
| Production | Umberto Momi | Producer |