The Star Stag

While going on a camping trip to one of the oldest forests in all of Ooo, Marceline and Princess Bubblegum encounter the Huntress Wizard as she pursues a creature from space she calls the Star Stag. P.B. and Marceline join Huntress Wizard on her quest in order to investigate this mysterious creature, and to try and keep her from torpedoing her relationship with Finn.