Nami and Chopper find Luffy and Zoro and struggle to rescue them. Zoro recovers his Sandai Kitetsu and breaks the chimney, while Luffy tears two buildings apart. The crew is gathered and Nami reveals the truth about Robin.
The Straw Hat Crew goes to an abandoned warehouse where old Kokoro shows them another train, the Rocket Man. They find Iceburg, who has been setting it up, and depart to chase the Umi Ressha.
The Franky Family joins the Straw Hat pirates when the Rocket Man is leaving the city, and in the way Pauly and two more shipwrights appear in the train. Tree teams must work together to defeat CP9.
In order to avoid the dangerous wave that's coming ahead, Luffy and Zoro join their forces. Sanji and Franky are decided to go after Robin but Usopp considers that it's not his duty. In exchange, a mysterious hero appears.
Sanji, Franky and mysterious Sogeking mock T-Bone and his men and release their wagon, leaving them behind. The friends meet master Okama Kempo and Sanji bid them to move forward.
Sanji is forced to use his hands in the battle against chef Ramen Kempo, who has build himself a noodle armor. The Straw Hat chef uses knifes in order to defeat him.
The Rocket Man and his people spots a halved Sea King and Zoro decides to fight against the responsible. T-Bone is running through Umi Ressha rails towards Puffing Tom when he sees the light coming towards him.
The Rocket Man meet a strange toad in the middle of the road, while Sanji, Franky and Sogeking manage to take Robin and split the wagons. Robin insists upon going to Enies Lobby but Sanji begs her to return with the crew.
The Rocket Man train is diverted from the rails due to Yokozuna's rage but old Kokoro calms him and the Kaeru joins the crew. Franky Family finds Sanji and Sogeking. Puffing Tom arrives to Enies Lobby.
The Straw Hat pirates, Franky Family, Galley-La shipwrights and Sogeking prepare their strategy to land in Enies Lobby, but Luffy can't wait and rushes on his own. The battles commences sooner than expected.
The Franky Family along with the shipwrights manage to open the first gate and make it to the main entrance though two brother giants, Oimo and Kashi, stop them. The Straw Hat crew is waiting and Luffy has an army in front of him.
Kashi the giant is defeated when the King Bulls arrive to the main entrance and only Oimo is left. Luffy avoids unnecessary fight with the marines and heads to the Headquarters. The Straw Hat crew's time has come.
Spandam plans on taking the Straw Hat Pirates prisoner despite his agreement with Robin to leave Straw Hat Pirates alone if she surrenders herself to the government.
Luffy fights against Blueno in the Palace's roof while the Straw Hat Crew receives help from Sogeking and the giants. CP9 agents Kaku and Califa are congratulated with two Akuma No Mi.
The Straw Hat Crew arrives to the foot of the main gate, on the roof of which Luffy is fighting with Blueno. In order to protect his nakama, the captain unravels new amazing abilities.
Nami, Zoro, Chopper and Sanji are approaching the main island's limit and the Franky crew must pull down the levers of the bridge. Luffy demonstrates his strength and Robin hears him approach.
Zoro gets lost in the palace and decides to open a hole in the ceiling. His attack draws Nami and Chopper with it and together they get to the roof. Sanji kicks his way up and Sogeking is thrown by Kashi. The gang reunites again.
CP9 boss Spandam threatens Robin with the Buster Call and her sorrowful memories arise. As a girl, always disrespected by her people, she met Saul the giant, who awakes laugh in her. 4 days later, a mysterious visit arrives.
Saul realizes he knows Robin's mother and warns her about the imminent danger. Olvia talks to the archaeologists and goes after 20-year-ago CP9 captain. The world government sets the ancient library on fire and Saul runs to take Robin with him.
The Ohara archaeologists tell their theory about what they think that happened during the Lost Century. The Buster Call is summoned and the Tree of Knowledge is set on fire. Robin is rescued by Saul, the ex vice admiral.
Since she was 8, Robin's life has been a constant struggle to survive. Everybody has told her that her existence was a crime, and now Luffy begs her to stay alive.
The key to open the seastone handcuff on Robin is owned by 5 members of CP9. Thus, each Straw Hat Pirate and Franky engages themselves into battle against CP9. Meanwhile, Spandam and Lucci takes Robin to Gates of Justice through a secret passage.
Zoro encounters Kaku, while Usopp tries to steal a key from sleeping Jabura. Both are the user of Zoan-type devil fruits, enable Kaku turns into a giraffe and Jabura turns into a wolf.
Sanji encounters Kalifa, and because of his vow to rather die than kick a woman, he is defeated easily. Seeing Sanji being defeated and in a horrible condition, Nami decides to take over and fights against Kalifa.
Accidentally, Zoro and Usopp get handcuffed together and neither Jabura nor Kaku has the right key to open the handcuff. Thus, Zoro is forced to fight them both by using Usopp as his sword.
Chopper struggles against Kumadori, and he has reached his limit in using Rumble Balls. But it is impossible for him to win without the power given by his Rumble Ball. So Chopper decides to use Rumble Balls once more and goes totally berserk.
In Grand Jipangu in Edo period, a little girl named Rika takes care of an ill man whom she calls Tot-san. Assuming Rika as the daughter, Buggy the Clown kidnaps her. Luffy comes to rescue her.