Megashima Amazon Lily

During the battle in the Shabondi Islands, the Straw Hat Gang was flown to various parts of the world by Bartholomew Bear. Luffy was blown away by the Amazon Lily of the Megashima Island. 

This country, which is forbidden to men, was ruled by the pirate empress Boa Hancock, one of the "Seven Warriors of the King", but Luffy accidentally saw Hancock's secret = the crest on his back and was executed. 

In the arena where he was executed, Luffy fought Hancock's two sisters, Thundersonia and Marigold, and won brilliantly. In addition, by protecting the crest on their backs from being exposed to the public, they escaped execution.

When Hancock learns that Luffy is the man who caused the big incident of "beating up the Tenryujin", he confides in Luffy that he was once a slave of the Tenryujin. The crest on Hancock's back was the mark of a slave worn at that time. 

Hancock likes Luffy, who challenged the Tenryuu without any fear when no one should be able to oppose him, and allows him to rent out the ship.

However, on the eve of sailing, Luffy is informed that the public execution of his brother Ace is imminent. Luffy decides to postpone reuniting with his friends for the time being and go to rescue Ace alone. With the help of Hancock, who is attracted to Luffy and falls in love with him, Luffy heads to Impel Down, the Great Prison where Ace is imprisoned. 

While Luffy was heading for Impel Down, the rest of the Straw Hat Gang was also struggling with their own as they were blown away by the bear.

Robin is imprisoned in Tequila Wolf, a country of workers in the East Sea (East Blue). Nami is in Weatheria, a small sky island where weather science is sent, and Chopper is in the Kingdom of Turin, an island where birds from the "South Sea" rule over people. Frankie, Sanji, Usopp, and Zoro had each been flown to various parts of the Grand Line. Frankie travels to the futuristic country of Baltimore, which is called "Karakuri Island" on the winter island. Sanji is chased by the Okama in the kingdom of Kamabacca, and Usopp meets a man who calls himself Herculesund on a wild island in the Boyne archipelago. Brooke was mistaken for a demon in the impoverished country of Harahettania, and Zoro was being cared for by Gecko Moria's subordinate Perona on the island of Kraigana and the ruins of the kingdom of Sikkeaar.