Hoichiro Ohma is employed at an office. Everyone regards him as a modest figure. Even his partner Nanase remains unaware that he hides a deeper nature, yet it exists. When an individual falls victim to homicide; when a soul takes its own life bearing a curse upon its lips; or when a death demands judgment, he appears, for he serves as the Arbiter of Shadows. Adhering to the Shadowed Ordinances, armed with a volume crafted from human flesh and an extraordinary parrot, he delivers verdicts upon wrongdoers who would otherwise escape justice.