The series at large follows the adventures of Finn (a human boy) and his best friend and adoptive brother Jake, a dog with magical powers to change shape and size at will. Finn and Jake live in the post-apocalyptic Land of Ooo, where they interact with the series' other main characters, including Princess Bubblegum, Marceline the Vampire Queen, and BMO. Distant Lands focuses on new and returning characters in previously unexplored areas of the Adventure Time universe.