Casey finds himself in the Pizza Bizza Dimension, a world of molten cheese landscapes, floating pepperonis, marinara rivers, and overwhelming pizza smells. This bizarre realm is ruled (or at least partially managed) by Wizbert Pepperoni, an excitable and wildly incompetent pizza wizard.
Wizbert reveals that its experimental spell, the Cosmic Crusto-Fusion, went disastrously wrong. Instead of creating the ultimate harmonious pizza, it tore a hole in reality and unleashed Chef Gorgon, a terrifying culinary zealot who wants to transform the entire universe into a single, perfectly fused, flavorless entity: the Ultimate Fusion Pizza.