 The series follows the adventures of Finn (voiced by Jeremy Shada), a human boy, and his best friend and adoptive brother Jake (voiced by John DiMaggio), a dog with magical powers to change shape and grow and shrink at will. In "Return to the Nightosphere", Finn and Jake discover that they are trapped in the Nightosphere, a hellish dimension ruled by Hunson Abadeer, Marceline's (voiced by Olivia Olson) father, although they cannot seem to remember how they arrived. "Daddy's Little Monster" features Finn and Jake discovering that Hunson Abadeer has turned Marceline into a giant demon. The duo manage to save Marceline.
