A girl finds an old handgun in her attic and the symbolic object conjures a mystical scene of samurai gathering within the moss-grown location of Kasosan Shrine in Tochigi Prefecture. Jump to winter time, and a man is investigating a mysterious monster that was found deep in a rural coal mine seven years earlier. Since that time, a mysterious plague has spread through the nearby small town, inflicting the residents with a strange mental illness. A young Shugendo, missing for some time, suddenly resurfaces, transformed, intent on exorcising the world from the monsters haunting it. Directed by indie auteur Toshiaki Toyoda ("Blue Spring").