The Boat Club goes on their first outdoor practice. Riku, though, has an objective to fulfill while on this trip. Using translations of his grandpa's notes, he and Kogenta find a new In. Meanwhile, Danjou, a Chi-ryuu Toujinshi, and his Shikigami, Akagane no Misohito, terrorize a nearby rural town in search for a Ten-ryuu Kimon and then open it. To do so, they force the village leader into showing them the location of the Kimon. Riku and Kogenta find and confront Danjou and Misohito. When Riku decides to use the newly-found In, it inexplicably doesn't work. Can Riku get the In to work in time?
