The story is set in Yunyang County, a fictional ancient town in the late Tang Dynasty. It tells the story of Lu Chaoyang who joins the county government by chance and collaborates with female doctor Su Manqing, old catcher Wang Sandao and handyman Hu Tieniu to gradually solve bizarre cases one after another, from ordinary small cases to big mysteries involving temple conspiracy. The cases in the book progress layer by layer, each with its own characteristics. There are unjust deaths in villages and corpses hanging in ancient wells, as well as cases of missing wealthy businessmen and confused officials. The fate of the characters in the cases is connected with the main plot. One case after another is intertwined with Xie Qinghe's secrets, gradually revealing the shocking conspiracy behind it. As Lu Chaoyang grew up in solving the case, he realized the warmth and warmth of human nature and rebuilt his faith and life. The tone of the book is compact and bright, the plot is ups and downs and the humor is hidden in the details. In the end, all the mysteries are revealed in one fell swoop, and everyone gets a completely different ending.