Lin Mo, the criminal police captain, unexpectedly awakens and can see another world - where wronged souls file complaints and spirits are registered. A copy of the "Regulations on the Management of Non-Human Criminal Cases" was thrown on his head, and he became the only "Yin Yang Detective" in the world.
From then on, his style of painting crime scenes changed drastically. In the Bixian murder case, he took notes for the pen; in the fox demon fraud case, he adjusted the hotel surveillance to find the tail; in the face of the thousand-year-old zombie who clamored that the law could not control it, Lin Mo directly took out the mahogany sword-shaped law enforcement recorder: "Now the evidence is conclusive, you have the right to remain silent, but every word you say will become evidence in court in the underworld."
Until an unsolved case involving himself is reopened, all the evidence points to an impossible guy - the supreme god who sits in the clouds and controls the laws of heaven and earth.