The story takes place on the beach of Shanghai in the early 1930s. Guan Qingshan and Guan Qingyue are a pair of twin brothers and sisters. Guan Qingshan, who served as a patrol officer, disappeared inexplicably. In order to investigate the truth, his younger sister Guan Qingyue disguised herself as her brother Guan Qingshan and entered the patrol room where he used to work. Guan Qingyue's wit and good skills have enabled her to repeatedly solve cases
The story takes place on the beach of Shanghai in the early 1930s. Guan Qingshan and Guan Qingyue are a pair of twin brothers and sisters. Guan Qingshan, who served as a patrol officer, disappeared inexplicably. In order to investigate the truth, his younger sister Guan Qingyue disguised herself as her brother Guan Qingshan and entered the patrol room where he used to work. Guan Qingyue's wit and good skills have enabled her to repeatedly solve cases