During the changing times of the Republic of China, Shen Muqing, who possessed the martial arts inherited from her family, broke through the shackles of gender and became the first female detective in the patrol room of the French Concession in Shanghai. Faced with the exclusion of colleagues, gang threats and official corruption, she repeatedly solved strange cases with her high force value and mysterious golden finger. When her edge touches the interest network between deputy chief detective Zhao Shikui and gang leader Jin Xiaoshan, a life-and-death battle begins, involving power struggles and grievances. In the gray area between law and justice, can this young man in police uniform eliminate evil with an iron fist and create a ray of light for justice in troubled times?
