In his previous life, he was captured by the God of Dali Temple, but he was framed and died unjustly. After the death of the protagonist Xie Wuan, due to his righteousness and obsession with the truth, he was unusually appointed by the underworld as the lowest-level "Wuchang" under the Nine Netherworld, responsible for arresting the soul and preliminary investigation of the cause of death of the deceased.
However, he soon discovered that behind many seemingly normal deaths, practitioners, evil spirits, and even ghosts and gods were involved that ordinary people could not imagine. Relying on the meticulous reasoning and trace investigation abilities accumulated in his previous life, combined with Yinzai's unique authority of "listening to the remaining souls", he began to investigate these "supernatural unsolved cases".
Every time he solves a strange case, he can obtain "Yin De", thereby improving his rank in the Yin Division and unlocking higher authority and Taoism. From "Walking in Impermanence" to "Execution Officer", and then to "Judge" in charge of a party, the protagonist uses mortal wisdom to embark on an unprecedented path of "solving cases and proving the truth" in the underworld. The highlight is that it combines the setting of Eastern fantasy with the suspenseful reasoning of the original school. The protagonist has no system or cheats. The only "golden finger" is his brain and logical thinking that transcend the times. Through intricate cases, a huge conspiracy that runs through the three realms (humans, ghosts, and immortals) is revealed.