Folklore researcher Shen Xunyin received a mysterious commission and went to western Hunan to investigate a centuries-old "Gu Po Sacrifice" ceremony. On the night of arrival, a fire broke out in an old house in the village. A body wrapped in vines was found in the fire. The death condition was exactly the same as the local taboo legend "soul-haunting Gu". Detective Jiang Mo concluded that it was murder, but could not explain the strange signs of plant growth at the scene. As the investigation deepened, they found that everyone who had come into contact with the "Gu Po Festival" information was dying one by one, and the death methods were all recorded in hand-copied forbidden books a hundred years ago. Shen Xunyin pieced together clues from the yellowed charms, villagers' taboos, and ancient taboos, but gradually realized that the murderer was not imitating the legend, but correcting it. And the incomplete "Xiangxi Gu Pu" in her hand seemed to contain a secret that could subvert everyone's knowledge.
