Volatilized by Kuma, Luffy is thrown into the sky and ends up landing on an island populated only by women, where no men are allowed! After a breathless escape, he runs into Boa Hancock, the Pirate Empress and also one of the Seven Warlords!
Due to a misunderstanding, Luffy provokes the Empress's fury and finds himself forced to face her two sisters, each possessing the powers of Devil Fruits! But what strange secret seems to be hidden behind them, a secret none of them would wish to see revealed?