A biker's brother is killed while investigating the kidnapping of a young boy, the byproduct of a war between two crime families. The biker vows to get revenge by finding the kidnapped boy and destroying the two families.
You can now watch Syndicate Sadists online on the following streaming providers in the United States.
| Directing | Umberto Lenzi | Director |
| Writing | Vincenzo Mannino | Screenplay |
| Production | Luciano Martino | Producer |
| Sound | Franco Micalizzi | Original Music Composer |
| Crew | Gianluca Petrazzi | Stunt Double |
| Costume & Make-Up | Walter Patriarca | Costume Design |
| Costume & Make-Up | Franco Di Girolamo | Makeup Artist |
| Costume & Make-Up | Iolanda Angelucci | Hairstylist |
| Production | T. David Pash | Unit Manager |
| Camera | Federico Zanni | Director of Photography |
| Editing | Daniele Alabiso | Editor |
| Production | Vittorio Galiano | Production Manager |
| Crew | Riccardo Petrazzi | Stunt Double |
| Production | Claudio Cuomo | Unit Manager |
| Sound | Alexander Blonksteiner | Conductor |
| Editing | Amedeo Moriani | Assistant Editor |
| Writing | Vincenzo Mannino | Story |
| Art | Giacomo Caló Carducci | Production Design |
| Directing | Alessandro Metz | First Assistant Director |
| Directing | Mirella Malatesta | Script Supervisor |
| Production | Maria Spera | Administration |
| Sound | Bruno Zanoli | Sound |
| Sound | Angelo Amatulli | Boom Operator |
| Camera | Elio Polacchi | Camera Operator |
| Camera | Alfredo Senzacqua | Camera Operator |
| Camera | Bernardo Valli | Camera Operator |
| Camera | Mario Pastorini | Assistant Camera |
| Camera | Francesco Narducci | Still Photographer |
| Crew | Cataldo Galiano | Special Effects |
| Sound | Aldo Ciorba | Foley Artist |
| Sound | Sergio Basili | Foley Artist |
| Sound | Bruno Moreal | Sound Mixer |
