Richard is a medieval nobleman. After his first wife dies in an accident and is buried in the family vault, he remarries and has children by his second wife. A mad longing for his first wife Leonor comes over him, and he sells his soul to the devil for a chance to get her back. But when she returns, she is a murderous vampire.
| Directing | Juan Luis Buñuel | Director |
| Writing | Juan Luis Buñuel | Writer |
| Writing | Roberto Bodegas | Writer |
| Writing | Jean-Claude Carrière | Writer |
| Writing | Clement Biddle Wood | Writer |
| Writing | Bernardino Zapponi | Writer |
| Writing | Pierre-Jean Maintigneux | Screenplay |
| Writing | Michel Nuridzani | Screenplay |
| Production | Michel Piccoli | Producer |
| Sound | Ennio Morricone | Original Music Composer |
| Art | Enrique Alarcón | Art Direction |
| Costume & Make-Up | Luis Argüello | Costume Design |
| Production | Alain Coiffier | Executive Producer |
| Production | Serafín García Trueba | Executive Producer |
| Editing | Pablo G. del Amo | Editor |
| Costume & Make-Up | Romana González | Makeup Artist |
| Costume & Make-Up | Cecilia Drott | Makeup Artist |
| Costume & Make-Up | Concepción Cano | Hairstylist |
| Costume & Make-Up | Tomasa Benito | Assistant Makeup Artist |
| Production | Charlotte Fraisse | Production Manager |
| Production | Manuel Sánchez | Production Manager |
| Directing | José María Gutiérrez Santos | Assistant Director |
| Art | Antonio de Miguel | Assistant Set Decoration |
| Sound | Agustín Peinado | Sound |
| Camera | Romano Albani | Camera Operator |
| Camera | José Luis Criado | Second Assistant Camera |
| Camera | Miguel Ángel Muñoz | Assistant Camera |
| Camera | Felipe López | Still Photographer |
| Camera | Mauro Pezzotti | Grip |
| Directing | Colette Crochot | Script Supervisor |
| Costume & Make-Up | Pablo Espinosa | Wardrobe Master |
| Costume & Make-Up | María Teresa García Trueba | Wardrobe Master |
| Camera | Luciano Tovoli | Director of Photography |
