One Piece: Stampede is a standalone film celebrating the 20th anniversary of the anime and taking place outside the "One Piece" TV series' canon. Monkey D. Luffy and his Straw Hat pirate crew are invited to a big Pirate Festival that brings many of the franchise's most recognizable characters to compete with the Straw Hats in a race to discover Roger's treasure. Bullet, a former member of Roger's gang, becomes a new adversary for the Straw Hats.