As the supernatural resurges, everyone is signing contracts with ghosts and gods. Shen Du is the only one who can change the terms.
He doesn't rely on sorcery to exorcise ghosts. He finds loopholes in their contracts. Every amended contract comes at a price. The first six contract scribes all died. He is the seventh.
When the thousand-year master contract expires, he must choose between renewal and termination, using nothing but a pen to rewrite the rules governing the worlds of humans and ghosts.