A pair of young itinerant ladies are abducted on the eve of Judgement Day by a group of predatory cannibals, who discover that they are ancient Vampires. Following a brutal battle, the Vampires find themselves in the midst of an apocalyptic catastrophe as soul-stealing alien beings invade and attack humanity, transforming their victims into flesh-eating Zombies in the process. The forces of evil come together in a cataclysmic struggle for supremacy.