Arc 27Water 7 Under the Demon Flag
Allen came to Water 7 to pursue Trafalgar Law and adapt Pluton designs for the Endless Abyss, but the World Government’s attack turned the city into a battlefield. After the Demon Pirates defeated the Buster Call and negotiated with the Five Elders, Water 7 accepted their protection while the Straw Hats began building a new ship.
- Sengoku announced Ace’s execution as bait for war with Whitebeard, while Cobra told Vivi that Alabasta would transfer power to a parliament and offered her the Sand-Sand Fruit.
- Allen invited Vivi to join Utopia, traded Jewelry Bonney’s age-altering Devil Fruit for the Steam-Steam Fruit, and offered Hina a place with him, though she refused to betray the Marines.
- The Five Elders sent CP0 assassins and a devastating weapon to Water 7, where Allen arrived, obtained a shipyard from Iceberg, and warned the Straw Hats about Cipher Pol.
- After Allen lent the Straw Hats 300 million Beli for a new ship, he confronted Doflamingo and recruited Law, taking the Ope Ope no Mi in exchange for another Devil Fruit.
- The CP0 assassins attacked the docks, but Allen survived their weapon and defeated them, while Spandine ordered a Buster Call and the Straw Hats fought the agents seeking Pluton’s blueprints.
- Allen and the Demon Pirates stopped the Buster Call, with Shiki wrecking the Marine fleet and Aokiji freezing the harbor before joining Allen’s crew.
- Allen captured Spandine and told Aokiji he would negotiate with the Five Elders while preparing to strike the World Government during the Summit War.
- The Five Elders agreed to let Water 7 fly the Demon Pirates’ flag, Iceberg accepted their protection and agreed to modify the Endless Abyss, and the Straw Hats rented a shipyard to build their new ship.