About the Whole Cake Island Arc
The Whole Cake Island Arc (ホールケーキアイランド編, Hōru Kēki Airando Hen?), also referred to as the Totto Land Arc, is the 29th story arc of the manga and anime One Piece, the second story arc of the Whole Cake Island Saga, and the sixth story arc of the second half of the series.
Luffy, Nami, Chopper, Brook, and the minks Pekoms, Pedro, and Carrot head to Whole Cake Island, where Big Mom of the Four Emperors resides. Nicknamed the Sanji Retrieval Team, the group seeks to rescue their crewmate Sanji from his arranged marriage with Charlotte Pudding, set up to finalize a political alliance between the Charlotte Family and the Vinsmoke Family. However, during their operation, they become involved in a plot to assassinate Big Mom herself.
The Big Mom Pirates reached their territory, Totto Land, with Sanji in tow. Sanji refused to accept his situation, although he became enamored with Charlotte Pudding when Vito gave him a picture of her. Vito then talked to Sanji about how he admired Germa 66, who were portrayed as villains in the comic Sora, Warrior of the Sea. Sanji blew off Vito, causing Vito's crewmate Gotti to threaten Sanji, but Bege's wife, Charlotte Chiffon, prevented Gotti from harming Sanji.
Meanwhile, the Sanji Retrieval Team was starving when Luffy finally caught a fish. He immediately started eating it, but its skin turned out to be extremely poisonous and put him on the brink of death. The Thousand Sunny then entered Totto Land and was soon confronted by a ship belonging to Germa 66. They were greeted by Sanji's brother, Vinsmoke Yonji, and Yonji refused to help Luffy. However, his sister Vinsmoke Reiju then attacked him and came to the Sunny, where she used her "Poison Pink" abilities to suck the poison out of Luffy's body. Reiju revealed that the upcoming marriage had been arranged by her father, who initially had trouble finding Sanji until his bounty poster had been updated. This caused Luffy to become antagonistic toward her and Yonji, but the two siblings decided to part ways peacefully with the Straw Hats to avoid making a scene before the wedding.