The special takes place during the two year before the Straw Hats reunite on Sabody. Luffy is currently in Rusukaina training to get stronger to take on the New World. However the training is interrupted when Hancock's sisters, Marigold and Sandersonia, are kidnapped by the Byrnndi World, a pirate who was locked away on Level 6 of Impel Down but escaped during Luffy's invasion to save Ace, in order to lure Hancock to him and use her as a hostage against the World Government due to her Shichibukai status. Thus Luffy and Hancock head off to confront him and save Hancock's sisters.
田中真弓
as Monkey D. Luffy (voice)
中井和哉
as Roronoa Zoro (voice)
岡村明美
as Nami (voice)
古田新太
as Byrnndi World (voice)
島田敏
as Byojack (voice)
立木文彦
as Akainu (voice)
平田広明
as Sanji (voice)
掛川裕彦
as Dracule Mihawk (voice)
中博史
as Monkey D. Garp (voice)
大谷育江
as Tony Tony Chopper (voice)
山口勝平
as Usopp (voice)
矢尾一樹
as Franky (voice)
