After a disastrous morning, Fionna can't afford to take Cake to the vet, so she seeks help from an unconventional source.

Former Ice King Simon struggles to be a regular human in a magical world and considers taking desperate measures.

Cake crash lands in a fantastic new world. Fionna continues her search after witnessing something impossible.

Fionna, Cake, and Simon converge in a strange place to discover how they're connected.

Fionna and Simon discover their best selves, and a possible solution to all their problems, in a wintery kingdom. Marshall Lee helps Gary with a baking project.

Cake is recruited by a band of skilled vampire hunters. Gary and Marshall Lee attend a black-tie party.

Stranded in a desolate land, Fionna, Cake and Simon resort to desperate measures to escape.

Simon finds his mind transported across time and space while danger closes in on Fionna and Cake.

Fionna, Cake, and friends fight for their world while Simon battles his demons.