The race to save Ace begins with a little help from a very beautiful - and extremely powerful - Warlord of the Sea! Monkey D. Luffy and Boa Hancock arrive at the underwater prison of Impel Down, but the Snake Princess will have to use every ounce of her beguiling charm to smuggle the rubber-man past the guards. Once inside, an unexpected alliance with Buggy the Clown gives Luffy the best chance at surviving the Blade Trees and Spike Needle Grass of the prison's infamous Crimson Hell! While the rubber-man tries to avoid being sliced and diced, Princess Hancock flaunts her ample assets to secure a private chat with Fire Fist Ace. Next up on this mad dash through Impel Down, Luffy is reunited with the many faces of Bon Clay. Together, these old foes-turned-friends will join forces against a demonic, lightning-fast, devastatingly-powerful Minotaur as they fight their way toward the infamous inferno of the prison's Level 4!