During the Yongle period of the Ming Dynasty, strange things happened frequently in Yingtian Mansion. First, a wealthy businessman died mysteriously in a secret room without any scars on his body, leaving only a strange bronze rune. Then, the brothel's top sign disappeared in full view, leaving only a wisp of green smoke with a strange fragrance. For a time, the people of Yingtian Mansion were panicked, and rumors spread, saying that some kind of monster was causing trouble. Su Qingwan, who had just passed the "special channel" and became the first female promotion officer in the history of Yingtian Mansion, took over these difficult cases despite the doubts of "going through the back door". With her super powers of observation and logical reasoning, during the investigation process, she met Lu Zhao, the seemingly cynical but secretive commander of the Jin Yiwei. The two disliked each other at first. Su Qingwan felt that Lu Zhao was messing around, while Lu Zhao felt that Su Qingwan was meddling in other people's affairs. However, as the cases were further investigated, they found that there were inextricably linked connections behind these cases, which seemed to point to a mysterious organization. In the process of working together to solve puzzles and evade pursuit, the two gradually put aside their prejudices and became a tacit understanding partner. Not only do they have to face complex cases, but they also have to deal with open and covert attacks in the court and pressure from public opinion, and they also have to battle wits and courage with enemies hidden in the dark. In the end, can they uncover the veil of the mysterious organization and bring peace to Tianfu? Can Su Qingwan break the world's prejudice against women as promotion officials and achieve her own "hardcore counterattack"?
