In "One Piece Movie 9: Episode of Chopper Plus - Bloom in Winter, Miracle Sakura," the Straw Hats encounter a blizzard and land on Drum Island seeking medical help for Nami. They face the island's hostile reception and learn of Wapol, the exiled former king, and his vengeful brother, Musshuru, who possesses a dangerous Devil Fruit ability. This movie delves into Chopper's past, showing his rejection and eventual acceptance by Dr. Hiriluk and the island's people, as well as his loyalty to his friends. The film shows the Straw Hats' battles against Wapol and Musshuru, emphasizing Chopper's bravery and resilience. The story ends with a heartwarming resolution and the promise of a new adventure.