On October 25, 2019, Annie disappeared. The person who reported her missing was her landlady, Mrs. Wu. Officer Lu Kui searched Annie's bedroom and found a book titled The Diary of Anne. From the diary, he learned that Annie had picked up a piece of jade and had been possessed by the "evil spirit" He Xiaohua, causing her to lose her mind. To investigate Annie's whereabouts, Lu Kui questioned her husband, Lin Yang, and her psychiatrist, Wen Xiaoqing. As the investigation deepened, Lu Kui discovered that Annie was not only mentally ill, but also a gambler and an attempted murderer. Her husband, Lin Yang, also seemed to be hiding an unspeakable secret. Who is telling the truth? Is Annie alive or dead? And why did the "evil spirit" He Xiaohua possess her? It all began ten years ago...