In the third year of the Republic of China, Lin Qingjun, a young Chinese woman from Penang, Malaya, arrives in Linhe County, Zhili Province, with her husband, Tang Yunfeng. Her husband takes up the post of police chief. From then on, Lin Qingjun uses the medical knowledge she acquired at the medical college in Malaya to help solve criminal cases. Drawing on her professional expertise, she matches wits with criminals from all walks of life. She also uses her knowledge of the law to fight the corrupt policemen who were once Qing dynasty constables, doing everything she can to protect the legal rights of those involved. In this wilderness, where the rule of law is almost nonexistent, she works tirelessly to promote the rule of law and civilization.