No longer the ruler of Mewni, Star must now confront her own future…and her destiny. Star and Eclipsa team-up to stop a lethal spell gone rogue. Marco and Tom go on a dragon-cycling adventure. And when Star, Marco, Janna, and Tom traverse amnesia-inducing waters to get back to Mewni, they lose their memories. With a universe full of monsters spiraling out of control, and mysteries of the past yet to uncover, Star Butterfly will stand tall as she journeys to an epic finale!