In order to recruit a strong ally towards bringing down Kaido, Cat Viper and his crew stop by Whitebeard’s homeland to see Marco, the 1st division commander of the Whitebeard Pirates.

After reading about the Levely in the newspaper, Luffy's group finds themselves in the perilous sea surrounding Wano Country, which leads to the bottom of a waterfall. Luffy uses the giant carp swimming around them to pull the crew and ship up the waterfall, but they end up sailing into a whirlpool at the top, causing Luffy to be submerged.

A mysterious country, a rampaging slasher, ancient samurai rituals of seppuku - and Zoro in the crosshairs! When a street assault occurs, all signs point to Zoro! Meanwhile, Luffy finally arrives at the Land of Wano but all his friends are nowhere to be found.

While fighting the magistrate's men, Zoro retrieves his swords and demolishes the magistrate's home. Afterwards, Zoro becomes a wanted man. Back at Kuri Beach, Komachiyo and Hihimaru are fighting near the Thousand Sunny. Two Beasts Pirates arrive with a captive girl and try to capture Luffy. He easily defeats them and frees the girl, who introduces herself as Tama. After Tama tames Hihimaru, Luffy gets acquainted with her.

After securing the Sunny, O-Tama takes Luffy to the house where she lives with her master, the sword-smith Tenguyama Hitetsu, and prepares him a meal to thank him. She walk away for a moment when her stomach started growling. Now, the capital is the only place that is not a desolate land, but the two still live there waiting for the return of the pirate, Ace. Luffy reveals to them that unfortunately they waited in vain since Ace died. Hitetsu explains that, wrecked on the island, Ace helped them four years earlier during a famine. Meanwhile, Basil Hawkins, now a subject of Kaido, goes to investigate the soldiers defeated by Luffy.