Monkey D. Luffy and his crew, the Straw Hats, dock at the Sunny for the Pirates Festival, the grandest gathering in the pirate world orchestrated by pirates themselves. Buena Festa, the mastermind behind the festival, extends a special invitation to the Straw Hats and all the notorious Worst Generation pirates to revel in the festivities. With the festival attracting even the formidable Shichibukai and Marines, it becomes evident that the allure of hidden mysteries within the event is irresistible to all seafarers. The primary challenge of the festival is straightforward: locate one of the legendary treasures left behind by Gol D. Roger. As the competition unfolds, rival pirate crews engage in a chaotic free-for-all, battling for supremacy—until the unexpected arrival of a mysterious pirate drastically alters the course of the game.