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...
| Actor | Role |
|---|---|
 Diana SorelDr. Dora Materlick | Dr. Dora Materlick |
| NNicholas NeyKarl Von Rysselberg | Karl Von Rysselberg |
 Inés MoralesVeronica | Veronica |
 Loreta TovarMargaret | Margaret |
 Beatriz ElorrietaErica Rosenberg | Erica Rosenberg |
 Antonio Jiménez EscribanoBarón von Rysselberg | Barón von Rysselberg |
 José VillasanteOtto | Otto |
 Rosario RoyoHousekeeper | Housekeeper |
| RRafael VaqueroMajor Christopher Roland | Major Christopher Roland |
 Susan TaffBrenda | Brenda |
| MMaría Luisa TovarCyclist's Widow | Cyclist's Widow |
| FFrancisco BonmatíCyclist | Cyclist |
| JJesús Alesanco(uncredited) | (uncredited) |
| FFrancisco Correa(uncredited) | (uncredited) |
| RRicardo VázquezVampiro de las ruinas | Vampiro de las ruinas |