Boruto, Kawaki, and Buntan find a powerful weapon aboard the mobile fortress. Kagura, Hebiichigo, and Kyoho join them to help destroy the weapon, but Tenma of the Funato clan stands in their way. 

Boruto and the others are stranded in the middle of the ocean due to the ship being damaged. Luckly, they are found by the shipbuilders, Kajiki and Ikada, who are willing to tow the ship to their island to help repair it.