Occult journalist, Hayato Ibuki, encounters a strange girl during his investigations into a series of mysterious suicides in Tokyo. She implores that Hayato must live, before bestowing upon him a mystical device that allows him to capture celestial and arcane creatures. He is now thrust into a world beyond our own, home to horrific demons and celestial beings. In it, he must delve into dungeons called Layers and solve the mystery of the device. Where his journey leads him could decide the fate of our world.