One Piece: The Empress Returns, and the Shichibukai Lend Their Aid

After more than two hundred days of intensive training, Luffy, Zoro, and the others have undergone a complete transformation. Luffy unlocks stronger Haki, Usopp builds solid muscle, and Chopper develops a new form. With everyone in new gear and carrying powerful items Linney brought back, the crew heads for the great deep-sea prison, Impel Down, full of fighting spirit and ready to rescue Ace.