During the reign of Zhenzong of the Northern Song Dynasty, the government was in chaos and evil spirits abounded. Si Tianjian's small official Wuyong insisted on the concept of "studying things to gain knowledge" and was involved in a strange case that could overturn the imperial court! Watch how the male protagonist solves puzzles step by step, finds the truth, defeats evil spirits, obtains inheritance, destroys the "holy concubine", and finally "gets done and goes away, hiding his body and reputation"! This book is about the fourth part of Strange Cases, "Kunlun Ruins".