An artist sells his soul to the mysterious M in order to get revenge on the people who killed his girlfriend. Soon, he realises everything has a price, and he is transformed into a horned demon with a passion for killing.
| Directing | Brian Yuzna | Director |
| Writing | David Quinn | Screenplay |
| Costume & Make-Up | Gabriel Azkoitia | Costume Design |
| Costume & Make-Up | Kim Grau | Hairstylist |
| Crew | Tim Vigil | Graphic Novel Illustrator |
| Art | Isidre Prunés | Art Direction |
| Directing | Fernando Sánchez-Izquierdo | Assistant Director |
| Crew | David Quinn | Graphic Novel Illustrator |
| Sound | Xavier Capellas | Music |
| Crew | Miguel Tejada-Flores | Additional Dialogue |
| Camera | Jacques Haitkin | Director of Photography |
| Costume & Make-Up | Caitlin Acheson | Makeup Artist |
| Art | Isidre Prunés | Production Design |
| Production | Ted Chalmers | Co-Executive Producer |
| Production | Julio Fernández | Producer |
| Production | Carlos Fernández | Executive Producer |
| Production | Antonio González | Producer |
| Production | Brian Yuzna | Producer |
| Editing | Luis de la Madrid | Editor |
| Costume & Make-Up | Screaming Mad George | Special Effects Makeup Artist |
| Costume & Make-Up | Anthony C. Ferrante | Makeup Supervisor |
| Costume & Make-Up | Mark Nieman | Special Effects Makeup Artist |
| Sound | Marc Orts | Sound Re-Recording Mixer |
| Costume & Make-Up | Ron Karkoska | Special Effects Makeup Artist |
| Crew | Poli Cantero | Special Effects |
| Crew | Screaming Mad George | Special Effects |
| Visual Effects | Jaume Vilaseca | Visual Effects Supervisor |
| Visual Effects | Jesús Pascual | Visual Effects Supervisor |
| Crew | Antonio Arnalte | Stunt Double |
| Crew | Ricardo Cruz | Stunt Coordinator |
| Lighting | Moni Caballero | Gaffer |
| Camera | Toni Hernández | Second Unit Director of Photography |
