One day, Ayaka and Walnut, a duo of girls, get lost while hiking. They can't get a signal on their smartphones, and can't find their current location even when they look at a paper map. Wanting to get down from the mountain before the sun goes down, the two just keep walking. Eventually, they discover an old village. However, this village is a forbidden village where cult customs from the Edo period are still deeply rooted. Secret medicine...brainwashing drums...mountain shrine maidens...tengu legends...sacrificial rituals...the whole story of an extraordinary tragedy. #YoroP