In the third year of Xuantong's reign, a copper bell found at the scene of the Buzhuang murder case in Shuicheng Hall became the starting point for the collaboration between head catcher Feng Jian and "Sima Qingtian" Sima Chao. The two relied on hard-core details such as shoe prints and traces of bloody writing at the scene to investigate the case, but they also revealed a network of ruthless gangsters that roamed many places.
Since then, water transport secrets, salt merchants' silver ingots, ancient temple scriptures... A series of independent and strange cases have occurred one after another, and behind each unit is a hidden foreshadowing of the previous dynasty. Under the fireworks and undercurrents of the late Qing Dynasty, the two pursued the murderer across borders, from gangs to undercover chess in the court, and gradually approached a world chess game aimed at restoration.
Beneath the truth, there is truth. All clues will eventually lead to the ultimate secret that affects the entire generation.