A small rural Spanish village of the present is haunted by vampires. Dr.Dora Maeterlick is called to a nearby castle to cure the father of Baron Carl von Rysselbert who suffers from a strange blood disease. Erika, assistant to Doctor, falls in love with Carl. But Carl is a vampire and pretty soon he makes Erika his vampire bride. From now on Dr.Maeterlick plunges into a nightmarish whirl of dark happenings...
| Directing | José María Elorrieta | Director |
| Writing | Fermín Sandoval | Story |
| Writing | José María Elorrieta | Screenplay |
| Writing | José María Elorrieta | Story |
| Writing | Fermín Sandoval | Screenplay |
| Writing | Enrique González Macho | Story |
| Writing | Enrique González Macho | Screenplay |
| Production | Ricardo Vázquez | Producer |
| Sound | Joaquín Torres | Music |
| Sound | Angelo Francesco Lavagnino | Music |
| Sound | Vittorio Gelmetti | Music |
| Camera | Juan Ruiz Romero | Director of Photography |
| Costume & Make-Up | Adela del Pino | Makeup Artist |
| Production | Rafael Marina | Production Manager |
| Directing | Enrique Pérez de Gomara | Assistant Director |
| Crew | Antonio Molina | Special Effects |
