Mu Xia, who had just died and entered the underworld, coincided with the civil strife in the underworld. Bai Wuchang killed the judge and tried to take away the book of life and death and escape to the world. In the process of snatching the book of life and death with Bai Wuchang, he accidentally separated the book of life and death. From then on, the book of life and death was divided into two, and Mu Xia had to recognize the owner of the book of life and death. Bai Wuchang disappeared without a trace with the Death Book. For this reason, the King of Hell appointed Mu Xia as a temporary judge and went to the human world to retrieve the Death Book and capture Bai Wuchang and bring him to justice.
