In the third year of Yonghui, the Nine-Turn Linglong Pagoda that was a tribute from southern Xinjiang was mysteriously stolen, and more than 300 officers and soldiers escorted there were turned into faceless corpses. Lu Hanchuan, a secret agent of the Xuanjing Department, was ordered to investigate, but he was involved in the mysterious case of the sudden death of the late emperor twenty years ago. When he found half a dragon-patterned jade at the scene of the murder, he found that it fit perfectly with the fragment worn around the neck of Shen Qingluan, the demon girl from the Medicine King Valley.
During the pursuit of the murderer, the skinned academy master, the embroidered messenger hanging upside down in the imperial mausoleum, the household minister with a copper abacus embedded in his heart appeared one after another... Each corpse hid a fragment of the "Tuibei Tu". On the last page of the "Poison Sutra" that Shen Qingluan carried with him, there was a seven-star corpse formation that was exactly the same as the murder scene.
In the night fog of the Imperial City, Lu Hanchuan was forced to go with this woman who could control poisonous insects, but he didn't know that the medicine man's experiment she was carrying was the key to opening the underground palace of the previous dynasty. When the two unlocked the last mechanism, what they saw was the lifelike emperor's puppet on the throne, and the blood-stained accession edict behind the dragon throne...
