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...

As the true identities of the CP9 assassins are revealed, so is their real motive--to get their hands on the blueprints for the Pluton, the most destructive weapon of the ancient world! With Robin leaving the crew of her own free will, the CP9 won't let anything stand in the way of their mission... least of all the Straw Hats!