In the twenty-third year of Kaiyuan of the Tang Dynasty, strange murders occurred one after another in Chang'an City. All the dead lost their bones, leaving only their skins. Pei Xuan, the young minister of Dali Temple, was ordered to investigate, but he was involved in a secret palace case from the Taizong period twenty years ago. As the investigation deepened, Pei Xuan discovered that the series of cases were actually related to the long-lost ancient witchcraft "The Art of Weary of Victory" and the "Secret of Immortality" studied by the alchemists during the Qin Shihuang period. From Chang'an to Luoyang, from the ancient roads in central Sichuan to the deserted villages in Lingnan, each boneless corpse connects a terrifying mystery that spans hundreds of years. And the truth is hidden in the secrets of the construction of the First Emperor's Mausoleum that were not recorded in "Historical Records"...