Aging vampire hunter Professor Abronsius (Jack McGowran, THE EXORCIST) and his bumbling assistant Alfred (Roman Polanski) travel to Transylvania where they encounter a group of vampires overseen by Count Krolock (Ferdy Mayne). When Krolock kidnaps the tavern keeper's daughter Sarah (Sharon Tate, then Polanski's wife) who Alfred is smitten with, the fearless vampire hunters set out to rescue her.