In a fading village in the Japanese countryside, the school is about to be closed, which weighs heavily on the students. Freshly arrived from Tokyo with his father after an acrimonious divorce, the shy Akira escapes into drawing and agrees to participate in a mural project to mark the end of the institution.
Seven years ago, a mysterious monster was found deep in a rural coal mine. Since then, rumors of a plague spread through the small town, and people experience an unexplainable mental illness. A young Shugendo practitioner goes missing only to resurface transformed, intent on exorcising the world from the monsters haunting it.