[Machine Translation] Ryuganuma, with its legend of sacrifice, and the neighboring Mount Ara, which rises next to it. Shiho, a high school student, visits the village of Yamauchi, where her grandmother once ran away with her mother, only to be caught up in a terrible ritual on the night of the village festival. The young man who appears before Shiho, who is in an absolutely desperate situation in the forbidden mountain area, is friend or foe, man or crow...