Lin Yan, the successor of the medical sage who came out of Wuyin Village in the southwest, carries the secret identity of the master of the "Watch Night Pavilion". In order to fulfill his master's orders and find out the truth about his master being harmed by the "Heart-Eating Gu", he entered Linzhou City with half a jade pendant. While using his unparalleled medical skills to resolve the crisis, he gradually gained the trust of Su Qingyuan, the daughter of the Su family. At the same time, he dealt with Zhao Tianxiong, a pharmaceutical giant in Linzhou, and the mysterious black poisonous poison organization. He even accidentally discovered that the secret key to the "Ten Thousand Gu Mountain" was hidden in the Su family's brocade box.
From the poison array trap in Qin's Medicine House, to the life-and-death showdown in the abandoned pharmaceutical factory, to the fight for the holy relics at the Wan Gu Mountain Altar, Lin Yan worked step by step, but when he solved the mystery of the "heart-eating poison", he was shocked to realize that the sacred relic was the key to the "world of poison". The black Gu organization's mechanism Gu, the Liu family's father and daughter's swaying positions, the internal disputes in the Night Watch Pavilion, and layer upon layer of crises followed one after another. In order to protect the people he loves and the peace of the world, Lin Yan holds the sacred object and embarks on a new journey to uncover the secrets of the Gu world and fight against the ultimate evil. A greater conspiracy is hidden deep in the mist.
