Johnny loves this computer game, Only You Can Save Mankind. But the aliens, the ScreeWee, don't. Johnny is, after all, the Hero with a Thousand Extra Lives. They all have one life. When they die, they die. Forever. So the alien Captain decides to take matters in her own hands, and surrenders. Johnny finds himself trying, not to save mankind from the alien hordes, but to save the alien hordes from mankind. But plenty of advice from his loopy friends, a terminally clever girl named Sigourney, and the Captain herself, and Johnny takes on mankind so the aliens can fly away home. If not him, says the Captain, then who else?