In the prosperous age of Kaiyuan, undercurrents surged beneath the beauty of Chang'an. Di Renjie's disciple Zheng Mingyi, a declining scholar, relied on his family knowledge to start as a small judicial assistant in Wannian County. He teamed up with Su Jin, a commoner woman who was proficient in medicine, and Xue Jie, a descendant of Xue Rengui who was loyal, brave and righteous, to work together in one hundred and nine houses.
Lantern night in the Shangyuan Dynasty, the two cities in the east and west, the mixed living of Hu and Han people, the ban on drums at night... All the atmosphere of the prosperous Tang Dynasty have become a stage for investigation. The seven unsolved cases are intertwined, involving political intrigue, economy, academic field, and military affairs. They seem independent but point directly to a conspiracy to subvert the government and the opposition. Zheng Mingyi adheres to the original intention of the law, breaks through the strict concepts of official rank and family status, and restores the truth to Dabai.
