About the Zou Arc
The Zou Arc is the 28th story arc of the manga and anime One Piece, the first story arc of the Whole Cake Island Saga, and the fifth story arc of the second half of the series.
After defeating Doflamingo, the Straw Hats, Trafalgar Law, Kin'emon, and Kanjuro arrive on Zou, in order to reunite with Sanji and the others. However, they discover that Sanji has been swept up in a set of personal and political entanglements and that Zou has been subjected to a siege by Jack of the Beasts Pirates.
While the Going Luffy-senpai sailed toward Zou, the Straw Hat Pirates discovered that the Barto Club had little knowledge on how to navigate through the ocean's waters as a hailstorm was raging.
At Marine Headquarters, Kizaru received a report that the Warlord of the Sea, Edward Weevil, the self-proclaimed son of Whitebeard, had massacred the A O Pirates, making them the sixteenth subordinate crew of the Whitebeard Pirates that he had annihilated. Meanwhile, Weevil's mother, Buckin, the self-proclaimed lover of Whitebeard, persuades Weevil to massacre all of Whitebeard's former subordinates to claim Whitebeard's treasure, as he is his only biological son. After learning of Donquixote Doflamingo's defeat, Weevil and Buckin decided to go after Luffy to get information on Marco the Phoenix, Weevil's next target.