It's Halloween time at Galaxy High and Josh, Yoko, Brett and Fluffy decide to head to nearby planet Treat to do their intergalactic trick-or-treating! When they arrive and begin their door-to-door treat gathering, however, they are sorely disappointed. Instead of yummy cosmic candies and delightful space sweets, their bags are filled with an assortment of bizarre alien oddities! Declaring Halloween officially a bust, they decide to head back to school. But just as they're about to take off, they see a flier on their ship's windshield. Upon closer inspection, they realize it's an invitation to a space-tastic Halloween party