An ancient race of demons attempts to return to power after their destruction 5,000 years ago. A doctor who helps a dying elderly female patient inherits her powers as the new guardian against the resurrection of the demon race. He then seems to accidentally travel back in time 5,000 years to witness the demons slaughtering and feeding on humans. He vows to destroy the demon race and nearly succeeds. However some of the demons manage to travel to the future and are waiting for him when he returns to his own time.