The Land of Water is taken over by pirates, and contact with Denki's Team 5 is lost. The new Team 7 joins up with a unit led by Kagura and sets out for Dotou Island to assist Team 5 and rescue the islanders. However, the unit is made up of Buntan, Hebiichigo, and Kyoho, who in the past had called themselves the “New Seven Ninja Swordsmen of the Mist.” Sarada and Mitsuki go ashore to scout the island while Boruto and the others stay back and watch the situation nearby.

As Sarada and the others hurry to evacuate the people of the island, Boruto grows anxious when he learns they are being threatened by the mobile fortress, which is equipped with a powerful weapon. Kagura, Hebiichigo and Kyoho show up to assist Boruto, Kawaki and Buntan. Together, they do what they can to destroy the weapon to protect their friends, but they are obstructed by Tenma and are forced to fight him.

Naruto falls ill, and Sasuke goes to the Tatar Observatory to try to find a cure.

Sasuke and Sakura work together to gather information concerning the Ultra Particles. Unfortunately, there is still much they don’t know, and they are unable to figure out where to get answers. Eventually, Sasuke finds a clue to the whereabouts of the Ultra Particles from something his cellmate mentions. Meanwhile, Sakura discovers a hint to unraveling the mystery of the Map of the Heavens from a game called Star Lines. Having finally gathered the information they need, Sasuke and Sakura try to obtain the Ultra Particles. However…