 Sir Karell has been murdered, and the tiny pinpoint wounds on his neck suggest that a vampire did it. Baron Otto and Dr. Doskil are convinced of it, while the police inspector from Prague refuses to believe. Prof. Zelin, who specializes in the occult, must convince him that a dead count and his wife walk among the living and threaten both Karell s daughter and her fiancé, along with everyone else in the frightened village. At least that s how it all seems ...