In this new cooperative board game Luffy and his crew arrive in Water 7, the famous island-city with its seven naval shipyards. They soon realize that their boat, the Going Merry, is not reparable! They will have to find material in order to build a new one. But the CP9 will do everything to stop their progress and have kidnapped Robin. Will they be able to save their friend, build the Thousand Sunny and board it before the Aqua Laguna, a gigantic wave, invades the game?