Michael K. already has a few strikes against him. He's a new kid at a new school in a new town, but did he really have to get stuck sitting next to the two weirdest kids in the classroom? The girl, Jennifer, is halfway through eating her pencil when the boy, Bob, tells Michael that the two of them aren't human. They are Spaceheadz.
Bob, Jennifer, and the hamster, Major Fluffy, are on an intergalatic mission to save Earth. They must do this by recruiting 3.14 million Earthlings as Spaceheadz, and they think Michael K. is the person to help them get the job done.