An alien, Xanja, wants the cosmultigizer, a device that will make him essentially unstoppable! But it has been diverted to Earth, so he heads there. Detective Harry Gibbs learns of the meteor and investigates. Spider-Man follows a thug who stole a brooch from his aunt and ends up in the same area, and battles Xanja for the cosmultigizer! But he gets help from Harry Gibbs, who turns out to be Vaalu, an alien who sent himself back in time to take possession of Harry Gibbs decades ago (after the real Gibbs died in an accident). Between the two of them they should be able to handle one intergalactic tyrant, right?