In the autumn of 1984, Xu Zhiyuan, a provincial newspaper reporter who was demoted to Yunhe Town, received an anonymous report stating that four people had disappeared in the Wang family's old residence in the west of the city within three months. It was suspected that someone was covering up the truth by saying it was "haunted". This triggered the old pain of his father's mysterious disappearance three years ago.
During the investigation, he discovered that there was something strange hidden in the old house: blood stains, strange noises, and mysterious symbols appeared one after another, and villager Li Dashan concealed the truth. Feng shui master Zhao Wuye revealed that there is a "yin door" underground in the old house, which is related to the two worlds of yin and yang.
Xu Zhiyuan's own "Taiyin Body", the silver lock and "Secrets of Yin and Yang" left by his mother, and the clues in his father's notes all point to this Yin door. At the same time, the tomb robbers want to use the living soul to open the underworld door to obtain the treasure. He struggled between science and superstition, faced evil spirits and pursuits, and explored family secrets and the truth behind the underworld.
