Fionna and Cake – with the help of the former Ice King, Simon Petrikov - embark on a multiverse-hopping adventure and journey of self-discovery. All the while a powerful new antagonist determined to track them down and erase them from existence, lurks in the shadows.
Jessica navigates her way through a world where everything seems much bigger than she is; inspired by the grown-ups around her, she persists in conquering monumental children's tasks.
The gang must venture into a crazy imaginary world to rescue Frankie when she disappears inside a mysterious box.
