La llamada del vampiro (1972)

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...