One Piece: The Giant Mechanical Soldier of Karakuri Castle

Synopsis

In "One Piece: The Giant Mechanical Soldier of Karakuri Castle," the Straw Hat Pirates retrieve a treasure chest from a sunken ship, discovering an elderly woman inside. She convinces the crew to take her home by offering a golden crown concealed on her island, Mecha Island. When they reach the island, the pirates face an assault from its leader, who suddenly shifts his attitude and requests their assistance in unraveling the enigma of the Golden Crown.