At night in the prosperous Tang Dynasty, the curfew was sounded in Chang'an City. Zhang Shisan, an old watchman, traveled through the culverts of the ghost market and the deep residences of powerful people, and witnessed seven strange and strange cases, including the case of selling stolen Persian glass, the murder of an elephant slave with a curse, and the murder of a brothel. The female figure in red at three o'clock in the morning, the transnational black chain tacitly approved by Jin Wuwei, and the blood-stained South Sea secrets of the Kunlun slaves are all hidden among the lights and shadows. Based on the rise and fall of the thousand-year watchman system, this book reveals the dark side of history such as the lightning strike of Zaomu Bang Town, the book of life and death, the rule of fire that burns the sky and destroys the king's spirit, and reproduces the slander of Hu Shang, the nightmare skills of Si Tianjian, and the intertwined spy network of Heshuo Fan Town. When Huang Chaojun's torch burned down the last of the evil-suppressing bangs, Chang'an City asked in the blood and fire: Is it the ghosts or the human heart that is forbidden at night? An epic of the dark night of the Tang Dynasty that blends textual research and suspense, making the banging sound in the folds of history reverberate in the souls of modern people.