Bob accidentally earned the highest test score on the planet and is shipped off to the best school in the universe, the galactic Astro Elementary, located deep in space. That is where he befriends Beep, a curious little alien. With Halloween right around the corner, Bob tells Beep all about the ghostly holiday, from the crazy costumes to the endless candy. There’s just one problem: Astro Elementary doesn’t celebrate Halloween! Bob can’t imagine his life without a day of scary ghouls and sugary sweets, so he organizes a secret Halloween club. But soon, a horde of grotesque alien creatures hears about all of the tasty treats and invades the school! Bob and Beep may have saved the holiday, but will they be able to save the school?