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 existe…
Finn attempts to prove to Jake that Flame Princess isn't evil while trying to win her heart turns into a quest to stop her from taking over the Goblin Kingdom.
"Once upon a time, before people came along, all the creatures were free and able to be with one another", narrates the voiceover. "All the animals…