During the Republican era of China, in Xingwu Town, a traditional Chinese medicine doctor known as Uncle Nine attends a memorial ceremony at the Qian family estate. During the ritual, Miss Qian is found strangled to death. Uncle Nine discovers a jade pendant bearing the image of Zhong Kui, the demon-quelling deity, left at the crime scene. He suspects the murder may be connected to an old grudge against Master Qian. When a second murder occurs, Uncle Nine teams up with Police Captain Liang Liansheng to secretly investigate.