Something is rotten under the leaves of the forest. For Hou Hanshin, his village on the forest's edge trembles as it feels the cold grip of an invisible threat closing in. For Sofi, one of the Fox Spirits assigned to watch over this small slice of Earth, the trees and streams represent more than just her duty to the Heavens. They are a part of the home she shares with her sisters.

Alone, they each set out to pick their way through the undergrowth, and together they plunge into an unknown evil.