Attention, diary fiction readers! Have you met Cheesie Mack? You'll love Cheesie's wacky lists, drawings, and made-up words as he tells the hilarious story of a Halloween prank that sort of freaked him out.

Cheesie and his best friend, Georgie, are too old for trick-or-treating. Besides, all that spooky nonsense is just for kids! To prove it, they pull a "far out" prank that has the whole school abuzz about aliens. When Cheesie and Georgie reveal that they were the masterminds behind the trick, Cheesie's evil sister, Goon, plots revenge. She recruits one of Cheesie's friends to pull off a prank that will have Cheesie wondering if the truth really is out there. . . .