The third One Piece film strands the Straw Hats on an island ruled by intelligent beasts. Separated from his crew, Chopper is mistaken for the prophesied King of Beasts and embraced by the animals and a pirate-hating boy. When Count Butler and his horn hunters arrive to devour the island's treasure for power, Chopper and his crewmates must defend their new friends in a standalone, lighthearted adventure.