The play is adapted from Phoenix Qi's novel "Chang'an Bronze Sparrow".　　Shen Du (played by Ding Yuxi), the leader of the cabinet of the Internal Guard Mansion, handled the case decisively but was "notorious", Yan Xing (played by Deng Enxi), the concubine of the Yan Mansion, escaped the marriage of the Empress Dowager because of the third sister, in order to protect the family, Yan Xing married her sister and married Shen Du. Bizarre cases occur frequently in Beijing, Shen Du and Yan Xing have worked together to solve a number of unsolved cases, and the relationship between the two has gradually warmed up in the process of solving the case.