The story takes place in Tianjin in 1947. Zheng Xinling (played by Lu Chen) is the daughter of a wealthy businessman. She has no worries about food and clothing on weekdays and lives a life like a princess. However, her mother died in a car accident. Xinling was deeply shocked and soon suffered from depression. Ning Ya (played by Feng Bo) is a psychologist who returned from studying abroad. After consulting, he took Xinling to a secluded villa for treatment. After staying in the villa, Xinling found a seemingly ordinary diary, but when she looked through the contents, a series of strange phenomena followed one after another. First, someone died strangely, and then every midnight, the villa would sound the horror music of ghosts and monsters, and bleeding human specimens would appear. Then, even stranger phenomena appeared. It was a night of power outage...