An ear-splitting roar sends an ordinary school day into chaos, and it's almost a relief for Jake, because he doesn't want to be in his new resource room class, with words like "dyslexic" and "disabled" swimming round his head. Why can't he just be normal?

But there's nothing normal about the fuzzy purple alien who calls out to Jake from the recycling depot, or the sentient spaceship/teacher who is controlling the hologram. If Jake and his friends don't do Owl a favor, humans might find out about aliens, the world might go crazy, and Owl's alien students will definitely fail. First, though, the kids have to sneak off on Halloween while they are supposed to be trick-or-treating...