In the 1920s, Shanghai was experiencing social turmoil, gang rule, spies running amok, and undercurrents surging under the revolutionary wave. Young detective Xu Lingyi encounters news reporter Gu Shuyao while solving a bizarre murder case. The two worked together to investigate, but they were involved in a larger political whirlpool. As the case involves social elites, gangs, foreign forces, and revolutionary underground parties, the truth hidden in layers of fog emerges. The ten volumes of stories focus on different suspenseful events and the protagonist's growth curve, revealing the power struggle and human struggle under the urban surface of the Republic of China. Each volume of cases is both independent and related to each other. Multiple clues are intertwined to form a complete scene. In the end, the fate of all the characters is integrated and sublimated in the troubled times.
