The human slaves have been freed and King Neptune decided to move the New Fish-Man Pirates to Fish-Man Island to do penal work under the watch of the army. The Straw Hat Pirates ran away from Gyoncorde Plaza and Jinbe postpones Luffy's invitation. An Ammo Knight caught up to the Straw Hats and gives them Neptune's invitation to the banquet that the king has organized, which Luffy accepts. The New Fish-Man Pirate officers have been locked away along with Vander Decken IX, and Wadatsumi has been banished from Fish-Man Island. The Straw Hats arrive at Ryugu Palace where they party, eat, sing, dance, drink, and have fun. After a while Neptune leaves the party room and meets Robin, who asks him about Joy Boy and about the promise that he made. She then reaches the conclusion that Shirahoshi and her abilities make her the ancient weapon Poseidon.