One day, Boruto and Konohamaru rescue Remon Yoimura from an attack. Remon says she has come to Hidden Leaf Village for sightseeing. Boruto and Konohamaru offer to show her around the Leaf and provide some protection as well.

Boruto and Konohamaru pay a visit to Remon's village, but are puzzled by Remon's cold demeanor. It turns out that Remon is a descendant of the Souma, a family that has protected the village from goblins for many generations. Thus, she is not allowed to leave the village freely. Furthermore, an important ritual is to be held shortly, so Kankitsu Akitsuki, Remon's childhood friend, imprisons her to prevent her from seeing anyone.

Konohamaru tries to rescue Remon by checking up on Kankitsu, but he is caught and forcibly taken back to the Leaf Village. Boruto becomes suspicious when he sees Kankitsu alone and acting as if nothing has happened. He decides to investigate the situation, only to be shocked by the sight that unfolds before him! Meanwhile, Konohamaru is disciplined by the Hokage after receiving a complaint from Remon's village.

Konohamaru and Boruto set out again to rescue Remon but find they’ve arrived a little late. Soma has broken the seal and begins his resurrection. Boruto and Konohamaru try desperately to stop this, but none of their weapons and ninjutsu work against him. Watching them, Remon is inspired to carry out her vow and employ the method her ancestor used long ago to seal the monster.