In a secluded small mountain village of Jilong Township, Fengdu County, Chongqing, every time when it comes to midnight, mysterious and weird voices break the tranquil night. The originally peaceful life of Xiang Zhengyin's family is shrouded in fear. What kind of sound is it? Does it imply that a disaster will soon happen, or as the fellow villagers said, there is a ghost in Xiang’s home? After the experts from the Nanjiang Hydrogeology Team of Chongqing intervened in the investigation, they finally revealed the truth......