During the Zhenyuan period of the Tang Dynasty, Li Changling, a bad handsome man in Chang'an, inherited the memory of a top modern detective and mastered modern techniques such as criminal investigation, forensics, and reasoning. Starting from solving the "Chang'an Ghost Market Dismemberment Case", he successively solved strange cases such as "Floating Corpse in Qujiang Pool", "Theft of Daming Palace", and "Luoyang Peony Poison Killing". In the process, he revealed that he was the illegitimate son of former Prime Minister Li Shizhi, and discovered that all the cases were related to the rebellion conspiracy of the eunuch group "Bei Division". In the end, Li Changling exposed the Beisi plan through the clues of the serial case, disintegrated the forces behind the scenes, and became the "Super Detective Bad Commander" in the hearts of the people of Chang'an. Highlights: The collision of modern criminal investigation and ancient crime solving, with constant reversals in unit cases (such as the identity of the murderer being reversed, and the alibi being cracked). Each case has exciting points such as "slapping an incompetent official in the face" and "exposing the crimes of powerful people". The revelation of life experience is intertwined with the main conspiracy, and the pace is advanced.