Duclos's son, a worldly gangster, is compromised in a case of which he is innocent. The proof of this innocence is in the hands of a "competitor", the Marquis de Chemantel de Beauvoiron, a misguided aristocrat. He asked for $ 10 million to cede the document. Duclos will then imagine Chemantel contracting $ 10 million in life insurance for his son. As he discovered in Rome a tramp, a look-alike of the marquis, he will bring this man to Paris and arrange for him to die accidentally.
| Writing | René Barjavel | Screenplay |
| Directing | Camillo Mastrocinque | Director |
| Sound | Gorni Kramer | Original Music Composer |
| Writing | Vittorio Metz | Screenplay |
| Writing | Roberto Gianviti | Screenplay |
| Camera | Alvaro Mancori | Director of Photography |
| Art | Piero Filippone | Production Design |
| Art | Luigi Gervasi | Set Decoration |
| Costume & Make-Up | Ugo Pericoli | Costume Design |
| Sound | Raffaele Del Monte | Sound |
| Sound | Kurt Doubrowsky | Sound |
| Camera | Guglielmo Mancori | Camera Operator |
| Camera | Sandro Mancori | Assistant Camera |
| Costume & Make-Up | Goffredo Rocchetti | Makeup Artist |
| Costume & Make-Up | Maria Angelini | Hairstylist |
| Costume & Make-Up | Angelina Ferri | Hairstylist |
| Editing | Roberto Cinquini | Editor |
| Production | Roberto Palaggi | Production Secretary |
| Directing | Liana Ferri | Script Supervisor |
| Production | Franco Serino | Production Manager |
| Production | Franco Palaggi | Production Manager |
| Writing | Vittorio Metz | Story |
| Writing | Roberto Gianviti | Story |
| Writing | René Barjavel | Story |
| Directing | Leonardo Scavino | First Assistant Director |
| Production | Giorgio Papi | Producer |
| Production | Arrigo Colombo | Producer |