After Lord Archibald Marion is brutally murdered by an unknown assailant, his bitter and feuding family members gather for a reading of the will, setting into motion an increasingly chilling series of deaths when their arrival is marked by a second grisly killing.
| Editing | Antonio Gimeno | Editor |
| Production | Arturo Marcos | Producer |
| Directing | Jesús Franco | Director |
| Sound | Carlo Savina | Original Music Composer |
| Writing | Jesús Franco | Writer |
| Crew | Javier Pérez Zofio | Cinematography |
| Writing | Edgar Allan Poe | Original Story |
