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 Boruto and the others ready their plan, they learn that one enemy unit is heading to the village ahead of the rest. Since they haven’t finished making preparations, the village will be in danger, so they hurry to evacuate everyone. Kagura worries that they won’t have enough people to fight. Just in case, he releases the curse placed on Buntan, Hebiichigo, and Kyoho, temporarily setting them free. Hesitantly, they agree to fight alongside Kagura and Boruto.

Sasuke is attacked by Meno, the guardian of the Observatory, and then poisoned. Just when he thinks it’s all over, he is rescued by Sakura, who has infiltrated the Observatory as a doctor. She gets Sasuke reassigned to assist her, and they begin their undercover investigation. From the intel that Sakura brings, they learn that Ultra Particles were what cured the Sage of the Six Paths, but in order to find out where it is located, they need to obtain a document called the Map of the Heavens. They decide to search the Observatory’s library for it.