A British woman visits her husband at the Mexican mine he is attempting to reopen and discovers that the workers refuse to enter the mine, fearing an ancient curse. The couple enter the mine to prove there is no danger and inadvertently release a demon which possesses people's left hands and forces them to behave in a suitably diabolical manner.
| Directing | Alfredo Zacarías | Director |
| Writing | Alfredo Zacarías | Screenplay |
| Writing | F. Amos Powell | Screenplay |
| Writing | Alfredo Zacarías | Original Story |
| Editing | Sandy Nervig | Editor |
| Sound | Richard Gillis | Original Music Composer |
| Writing | David Lee Fein | Screenplay |
| Camera | Álex Phillips Jr. | Director of Photography |
| Production | Valley Hoffman | Associate Producer |
| Production | Paul Bagley | Associate Producer |
| Production | Miguel Zacarías | Executive Producer |
| Production | Alfredo Zacarías | Producer |
| Production | Joseph Yamas | Production Manager |
| Production | Fidel Pizarro | Unit Manager |
| Art | Javier Torres Torija | Production Design |
| Costume & Make-Up | Elan | Costume Design |
| Costume & Make-Up | Bertha Chiu | Hairstylist |
| Costume & Make-Up | Oze Morales | Hairstylist |
| Costume & Make-Up | Ken Horn | Special Effects Makeup Artist |
| Costume & Make-Up | Rosa Guerrero | Makeup Artist |
| Sound | José B. Carles | Sound Mixer |
| Sound | Ken King | Sound Mixer |
| Crew | Jack Gill | Stunt Driver |
| Crew | Kenny Endoso | Stunt Driver |
