"Detective Fang Miu" is the first TV series invested and filmed by Andy Lau. Shisan Niang (played by Pan Jie) was originally a female bandit. After she retired from the family and shouldered the burden of the family, she played her shrewd business mind and managed the family business well. However, Fang Tianmiu (played by Zhang Weijian), the only son of the Fang family, is a regret in Shisan Niang's life. Although Tianmiu, who is 28 years old, is very filial to his mother, he is naturally dull and has a low IQ. However, he has inherited his father's character. Tianmiu has a wife who was not married to him since he was a child - You Xiaoqing (played by Anita Yuen), the only daughter of Chief Patrolman You Dasheng. The clever and cunning Xiaoqing has been dissatisfied with Tianmiu's behavior since she was a child, so she often looks for ways to overturn the marriage, and she keeps fighting with Tianmiu. Finally, Xiaoqing opens a handicap. If Tianmiu can become a first-class patrolman, she will agree to marry him. In order to avenge his hatred, Tianmiu resolutely applies for the patrolman. However, strange things happened immediately. Whenever Tianmiao had a fever, he would turn into another Tianmiao who was extremely smart...