A girl arrives from London to visit her estranged relatives in a remote castle for the reading of her father's will. After a while she discovers that they are all in fact dead and her decision to live with them turns into a nightmare. Unable to leave she's drawn into a macabre underworld through visions of nude satanic rituals and her own impending sacrifice.
| Production | Karl Heinz Mannchen | Producer |
| Writing | Jesús Franco | Writer |
| Sound | Bruno Nicolai | Original Music Composer |
| Camera | José Climent | Director of Photography |
| Editing | Josyane Gibert | Editor |
| Production | Marius Lesoeur | Producer |
| Directing | Jesús Franco | Director |
| Costume & Make-Up | Elisenda Villanueva | Makeup Artist |
| Production | Robert de Nesle | Associate Producer |
| Writing | Paul D'Ales | Dialogue |
| Production | Karl Heinz Mannchen | Production Manager |
| Crew | Bruno Nicolai | Special Effects |
| Sound | Bruno Nicolai | Conductor |
