Miiko, a spirited fifth-grader, and her older brother Toriyasu embark on a perilous journey when their beloved dog Papadoll vanishes. Guided by two enigmatic feline allies, they traverse to Banipal Witt, a remote realm ruled by cats, only to discover Papadoll ensnared by the cursed Princess Buburina. Exposed to the land’s unnatural sun, the dog transforms into a colossal beast under Buburina’s control, her dark magic turning citizens into floating balloons.

With dawn approaching, Miiko and Toriyasu join forces with their feline companions to dismantle the curse, reverse Papadoll’s monstrous mutation, and liberate the trapped civilians. Their survival hinges on outwitting Buburina’s supernatural machinations, racing against time to evade sharing their pet’s grim fate. The siblings’ bond and resourcefulness are tested as they navigate this surreal world, where cooperation and swift action become their only weapons against an encroaching, irreversible doom.