"Secret Cases: Chronicles of the Ghost Patrol" is set against the backdrop of the turbulent period of the late Qing Dynasty and the early Republic of China. It tells the story of scholar Jiang Huaizu's legendary experience of being involved in the investigation of a series of supernatural incidents by chance. Facing spooky ghost rumors and strange cases that cannot be explained by common sense, Jiang Huaizu led his assistant Liu Hanshuang and detective Shen Shenyan to go deep into the folk, across cities and villages, to find out the truth. They not only have to crack through the layers of fog, but also face the conflict between social changes and folk beliefs. As the investigation deepened, Jiang Huaizu gradually discovered that there was a black hand manipulating people's hearts behind these incidents - Situ Mo, the leader of the mysterious organization. The three of them were repeatedly threatened and tempted, and the truth was in danger. In the end, Jiang Huaizu used the power of science and reason to expose the superstitious tricks, smash Situ Mo's conspiracy, and protect the peace of society. In the form of historical biography, the novel truly restores the social scene at that time, skillfully integrates the investigation of supernatural events with the test of human nature, and presents a magnificent historical picture.