The Whole Cake Island Arc (ホールケーキアイランド編 Hōru Kēki Airando Hen?), also known as the Sanji Retrieval Arc and the Tea Party From Hell Arc, is the twenty-ninth story arc in the series, while the Levely Arc is the thirtieth story arc. They make up the second and third arcs in Four Emperors Saga of One Piece, continuing from the Zou Arc.
Luffy, Nami, Tony Tony Chopper, Brook, Pekoms, Pedro and Carrot head to Whole Cake Island, where Big Mom of the Four Emperors resides. The Sanji Retrieval Team 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. In the midst of their operation, however, they become involved in a plot seeking to take down Big Mom herself.
After the Straw Hat Pirates’ actions against the Big Mom Pirates are revealed to the world, royalty across the globe gathers for the Levely. Meanwhile, the Revolutionary Army prepares for their next move.