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 and Simon discover their best selves; Marshall Lee helps Gary prepare for a once-in-a-lifetime opportunity.