In the third year of the Republic of China, Lin Qingjun, a young overseas Chinese from Penang Island, Malaya, accompanied her husband Tang Yunfeng to Linhe County, Zhili Province. Her husband served as the county police chief. Since then, Lin Qingjun has continued to participate in the investigation of criminal cases by relying on the medical knowledge he learned at the Malayan Medical College. She relies on her professional knowledge to fight wits and courage with all kinds of criminals from all walks of life. At the same time, she also relies on her legal knowledge to constantly fight against the corrupt police who were transformed from Qing Dynasty slaves, and try to protect the legitimate rights and interests of the parties as much as possible. In this wasteland where there is almost no spirit of rule of law, we are working tirelessly to popularize legal civilization.