A hit man working for the Yakuza double crosses his employers and flees with a cache of diamonds from the latest heist. Injured and hiding in the mountain regions of Spain, with Japanese assassins in hot pursuit, he takes refuge in the home of a local doctor and his two daughters who nurse him back to health and hide him from his pursuers, taking drastic and murderous measures to protect him... for they have plans of their own in store for their current guest.
| Writing | Paul Naschy | Screenplay |
| Directing | Paul Naschy | Director |
| Production | Masurao Takeda | Producer |
| Production | Julia Saly | Producer |
| Camera | Alejandro Ulloa | Director of Photography |
| Editing | Pedro del Rey | Editor |
| Costume & Make-Up | Consuelo Zahonero | Hairstylist |
| Art | Luis Vázquez | Art Direction |
| Production | Paul Naschy | Executive Producer |
| Costume & Make-Up | León Revuelta | Costume Design |
| Costume & Make-Up | Ángel Luis de Diego | Makeup Artist |
| Production | Hideo Sasai | Executive Producer |
| Directing | Kenichi Hikeda | Assistant Director |
| Lighting | Francisco Jurado | Lighting Technician |
| Sound | Enrique Molinero | Sound Engineer |
| Directing | Ángela Cristóbal | Script Supervisor |
| Production | Masurao Takeda | Production Coordinator |
| Camera | Juan Antonio de la Cueva | Assistant Camera |
| Lighting | Motogiro Noguchi | Lighting Technician |
| Directing | Sebastián Almeida | Assistant Director |
| Sound | José Antonio Bermúdez | Sound Engineer |
| Crew | Juan Ramón Molina | Special Effects |
| Production | Josep Guerrero | Production Assistant |
| Production | Masakatsu Saito | Production Assistant |
| Lighting | Diego Molina | Lighting Technician |
| Lighting | Katsunari Uchida | Lighting Technician |
| Directing | Junichi Suzuki | Assistant Director |
| Editing | Blanca Rodríguez | Assistant Editor |
| Production | Hidemasa Ogata | Production Assistant |
| Production | Felipe Ventura | Production Assistant |
| Camera | Juan Cobo | Assistant Camera |
| Camera | Kazuumi Sugimoto | Assistant Camera |
| Costume & Make-Up | Carmen de la Casa | Costumer |
| Editing | María Florinda Vidal | Assistant Editor |
| Lighting | Casimiro Dengra | Electrician |
| Camera | Kenji Hagiwara | Camera Operator |
| Camera | Eduardo Noé | Camera Operator |
| Crew | Benito Casado | Carpenter |
| Camera | José Salvador | Still Photographer |
| Production | Modesto Pérez Redondo | Production Manager |
| Lighting | Antonio García Gálvez | Lighting Technician |
| Costume & Make-Up | José Quetglás | Assistant Makeup Artist |
| Art | Eiji Tsuchiya | Assistant Art Director |
| Production | Masataka Shibahara | Production Assistant |
| Art | Kiosi Hasimoto | Assistant Art Director |
| Directing | Tosihiro Nakahara | Assistant Director |
| Camera | Masanori Fukuzawa | Assistant Camera |
| Art | Julio Arribas | Property Master |
| Crew | Teo Garcia | Transportation Captain |
| Camera | Guillermo Peña | Assistant Camera |
| Sound | Luis Castro | Foley Artist |
| Lighting | Katsumasa Naoi | Lighting Technician |
| Lighting | Antonio Sánchez | Lighting Technician |
