One Piece is a popular anime series that follows the adventures of Monkey D. Luffy and his crew of pirates as they search for the legendary treasure One Piece. In episode 510, Sanji, the cook of the Straw Hat Pirates, faces a dilemma as he tries to leave the Kamabakka Kingdom, a land of cross-dressing okamas. Meanwhile, Nico Robin, the archaeologist of the crew, learns some shocking news from a newspaper.

The episode begins with Luffy, Rayleigh and Jinbe escaping from Marineford after ringing the Ox Bell. They hijack a marine battleship and force one of the soldiers to open the Gates of Justice. They plan to head to Sabaody Archipelago, where they will reunite with their crewmates.

On the Torino Kingdom, an island inhabited by giant birds and humans, Chopper, the doctor of the Straw Hats, is preparing to depart as well. He receives a newspaper from a News Coo and is stunned by what he reads. He decides to hurry back to Luffy as soon as possible.

On Tequila Wolf, a bridge that has been under construction for 700 years by slave laborers, Robin is riding with an escort of revolutionaries. She has been rescued by them from the World Government and has been offered to meet their leader, Dragon, who is also Luffy’s father. However, Robin declines the offer and says that she wants to go back to her crew. She also receives a newspaper from a crow and smiles upon seeing Luffy’s message.

On Kamabakka Kingdom, an island ruled by Emporio Ivankov, the queen of the okamas and a commander of the Revolutionary Army, Sanji is trying to get a boat to leave. He has been trapped on the island for two years and has been forced to undergo harsh training by the okamas. He finally meets Ivankov, who has just returned from Marineford. Sanji asks him about Luffy and tells him that he is one of his crewmates. However, Ivankov does not believe him because Sanji’s bounty poster has a poorly drawn sketch of his face. Sanji also gets a newspaper and is shocked by Luffy’s actions.

The episode ends with Ivankov receiving a call from Dragon, who tells him to gather all the commanders of the Revolutionary Army. He also comments on Luffy’s bold move at Marineford and says that he is proud of his son.

The episode also shows the situations of other Straw Hat members. On the Boin Archipelago, Usopp, the sniper of the crew, has become slim and muscular after training with Heracles. He also gets a newspaper and is amazed by Luffy’s message. On Weatheria, a sky island where weather science is studied, Nami, the navigator of the crew, has learned a lot from Haredas, a weather wizard. She also gets a newspaper and is happy to see Luffy’s message.

On Kuraigana Island, a dark and gloomy island full of ruins and wild animals, Zoro, the swordsman of the crew, has been training with Mihawk, the greatest swordsman in the world. He also gets a newspaper and is impressed by Luffy’s message. On Bowin Island, a forest island full of giant plants and animals, Franky, the shipwright of the crew, has been working on his body and upgrading it with various weapons. He also gets a newspaper and is excited by Luffy’s message.

On an unknown island in the Grand Line, Brook, the musician and skeleton of the crew, has become a famous rock star known as Soul King. He also gets a newspaper and is moved by Luffy’s message. The episode concludes with a preview of the next episode, where Luffy and his allies will arrive at Sabaody Archipelago and face new challenges.