On Mutani-Isle, Slash attacks future Raph and Don, believing that they have killed his friends, the Mutanimals. Candy arrives to clear things up as to who the true killers really were. Future Raph and Don travel back to warn their younger selves that the Mutanimals have been killed and that someone is messing with the time stream. As they are delivering their message, they are confronted by the demon Null who promises to bring about the end of the world, starting with the Turtles and their friends.