In 1661 a man is burned to death for witchcraft and returns 300 years later for vengeance of the descendants of those who condemned him. The plot really makes little sense as the man disappears intoa comet that returns 300 yers later when he changes between a man and a n alien monster that kills his victims by sucking out their brains. Whilst tracking down the descendants he kills off random women. He invites his targets to a party along with the hapless policeman investigating the deaths of random women he has killed along the way.