In Luoyang, the capital of the God of Dayin, there is heavy rain and fog, and evil spirits and intrigues are entangled under the same lamp. The murder case in Yong'anfang revealed a strange death situation: black blood from the seven orifices, the soul was sucked, the eyes of the wooden statue in the ancestral hall were gouged out, but there was no sign of breaking into the courtyard. Shen Yan, a government official in the Shendu Prefecture, was ordered to investigate the case. With the help of a black jade pendant that can identify evil spirits and "system" clues, he gradually discovered that the case was not an ordinary murder case, but someone used the forbidden "soul-inducing incense" as a lure to set up a series of rituals with the help of evil spirits.
The toeless footprints on the paper shop, the painting-skinned ghost's stand-in technique, and the flaw in the Xuanmen Division's barrier all point to a more terrifying truth: there are people in the Xuanmen Division who are fornicating with evil spirits, slaughtering villages to refine souls, and hoping to welcome the "Eyeless Buddha" to the world. Prime Minister Lin Ruofu looks kind-hearted, but he is holding the "Huihun Wood", a forbidden tree in the Western Regions, and his words are sharp, as if he is testing and planning. Shen Yan moves step by step between the demon case and the court. He must not only pursue the murderer but also protect himself in the whirlpool of power - because he is not only the official who solves the case, but also the "first eye" that the other party wants most.
When the demon becomes a sword, and when the idol becomes a flag, Shen Yan must uncover the truth in the fog: Who is committing rebellion in the name of God? Who is manipulating Xuanmen and the court behind the scenes? And what kind of secret does the black jade pendant on his body hide that could overturn the world?
