Police detective Paolo Germi and the mysterious Marisa meet each other at a dance hall. Germi is unsuspecting of the secret Marisa is carrying with her: adverse conditions forced her into prostitution. As Germi finds the young girl brutally murdered, he decides to go after her killers. During his investigation, he enters a world of intrigue and obfuscation that leave an endless trail of blood.
| Directing | Sergio Martino | Director |
| Writing | Ernesto Gastaldi | Screenplay |
| Writing | Ernesto Gastaldi | Story |
| Production | Luciano Martino | Producer |
| Sound | Luciano Michelini | Original Music Composer |
| Camera | Giancarlo Ferrando | Director of Photography |
| Editing | Raimondo Crociani | Editor |
| Art | Riccardo Domenici | Set Decoration |
| Costume & Make-Up | Elio Micheli | Costume Design |
| Production | Valerio Ferri | Administration |
| Writing | Sergio Martino | Screenplay |
| Art | Elio Micheli | Production Design |
| Production | Pietro Innocenzi | Production Manager |
| Directing | Michele Massimo Tarantini | First Assistant Director |
| Directing | Tiziana De Nora | Second Assistant Director |
| Directing | Marisa Calia | Script Supervisor |
| Costume & Make-Up | Mario Van Riel | Makeup Artist |
| Costume & Make-Up | Alfonso Cioffi | Hairstylist |
| Camera | Claudio Morabito | Camera Operator |
| Camera | Salvatore Bella | Camera Operator |
| Camera | Bernardo Valli | Camera Operator |
| Camera | Antonio Minutolo | Assistant Camera |
| Camera | Fabio Conversi | Assistant Camera |
| Sound | Roberto Petrozzi | Sound |
| Sound | Massimo Mariani | Boom Operator |
| Production | Beniamino Sterpetti | Unit Manager |
| Production | Massimo Civilotti | Unit Manager |
| Production | Marcello Tagliaferri | Production Secretary |
| Camera | Vittorio Biffani | Still Photographer |
| Art | Paolo Innocenzi | Assistant Production Design |
| Editing | Lidia Pascolini | Assistant Editor |
| Editing | Stefano Testa | Assistant Editor |
