A vampire uses two sisters to seek revenge from the last member of a family that persecuted the undead in Europe, but his plan is threatened by a man who knows how to destroy him with a peculiar piece of music.
Count Cagliostro, whose family has tried for generations to rid the world of vampires, instructs his daughter and her fiance to protect several valuable documents.
A doctor and his assistant hunt down a vampire named Count Frankenhausen, who is terrorizing the populace.