As a child, Monkey D. Luffy dreamed of becoming King of the Pirates. But his life changed when he accidentally gained the power to stretch like rubber...at the cost of never being able to swim again! Years, later, Luffy sets off in search of the "One Piece," said to be the greatest treasure in the world...

Luffy and pals are headed for the fabled Rainbase, the town of dreams. There they accidentally attract the unwanted attention of the Baroque Works security as well as their old "pal" Captain Smoker! While beating a hasty retreat from both, Ms. All Sunday invites the crew to the casino's VIP room, which turns out to be a trap. To make matters worse, Vivi gets separated from the others and is pursued by the Baroque Works! Will she be able to shake her pursuers and spring her friends?!