Jerry Simon shares his past with Betty to Fionna, while Cake finds BMO, who lives alone in a desolate land. In the former Ice Kingdom, Fionna finds some old tapes documenting the Ice King's madness, and BMO unsuccessfully tries to fix the broken remote and burns off. They find BMO's friend "Jerry" is actually the Lich, having eliminated all life from the wish Prismo granted. Simon resumes the magic ritual, allowing Fionna and Cake to return to their universe before Scarab arrives; when Simon is about to put on the crown Fionna found, a red portal appears and they both fall into it.