From Ablaze:
After the mysterious disappearance of a countryside cop, the role is reassigned to Officer Daigo Agawa. He finds the remote village quaint, and he looks forward to an easygoing post among the warm and welcoming citizenry. Then he gets a call. The body of a local grandmother has been found. The scene immediately sows doubt for the young policeman.
A human bite mark has been left on the corpse, and any voiced suspicion of Agawa's is met with a strange, sudden, and intense hostility. Something dark is lurking under the idyllic facade of the charming mountain village. But can Officer Agawa spare himself and his family from it?