Finn and Jake chase the Lich through a dimensional portal where they meet Prismo, who tells them that the Lich wished for the extinction of all life. This leads Finn to wish that the Lich "never even ever existed.
故事讲述爱闯祸的无名小卒缪恩，有一天阴差阳错得成了重要的月亮守护者，而他任职第一天就造成大错，间接导致太阳被偷、月亮消失、世界大乱。于是，他不得不携手太阳守护者和蜡质姑娘茜尔，展开一场大冒险，揪出混乱背后的黑手，拯救世界。
