The story takes place during the reign of Emperor Renzong of the Northern Song Dynasty. Hearing that someone in Kaifeng Prefecture was beating drums to cry out for injustice, Lan Kwai Fong female chef Shengnan (played by Jiang Hong) galloped on horseback, she was going to plead for the people. Liu Mingyue (played by Yu Shiman) is a homely woman with a son and a husband. She and Shengnan have different backgrounds and personalities. Both of them have recently been involved in a series of murders for no reason. In Kaifeng Prefecture, the case is usually solved by Bao Daren (played by Fang Zhoubo) and his right-hand man, Nanxia Zhan Zhao (played by Wang Xianghong), while Beixia Ouyang Dong (played by Ouyang Zhenhua) is also a wise and brave person. Since Mingyue and Shengnan were involved in the murder case, they have shown their own strengths to help the court solve the case. Emperor Renzong issued an edict to confer them as "female detectives with knives" to become Bao Zheng's left and right arms to assist Kaifeng Prefecture. With the cooperation of Zhan Zhao, Gongsun Ce (played by Guan Jing) and others, they have solved many difficult cases. Although there were many jokes in the process of handling the case, justice and conscience made them shoulder the mission of eliminating violence and protecting the good...