In a world where the boundary between the living and the dead is thinning, a girl named Rui possesses the rare ability to see spirits and is searching for her missing brother. She crosses paths with Yuna, a former reaper who has been stripped of her powers and is desperate to regain her status. Together, they must navigate a landscape of dark magic and ancient deities to stop a corruptive force from consuming both the mortal and spirit realms.