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

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

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.

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