Yang Jian, the judicial god of heaven, has been laid off. Sent to Heian-kyō for re-employment with no money, no house, and no official position, he also owes three thousand taels to an izakaya. At his wits' end, an onmyōji whose smile is craftier than a fox hands him a contract: 'Sign it, and work to pay off your debt.' From then on, the Three Realms Agency officially opens for business. A God of War who speaks Sichuan dialect, a noble scion who speaks Japanese, a gluttonous Celestial Hound, a debt-ridden drunkard, a sharp-tongued nine-tailed fox, a proud Tengu, and a hot-tempered Ibaraki—this group of gods and monsters must handle the most absurd commissions in the three realms, and by the way, rewrite the heavenly laws.