Shuling (played by Xie Tingting) is a middle school substitute teacher who is in charge of Class 4E, which is full of rebellious students. Since taking over this class, some strange things gradually began to happen around Shuling, which made Shuling feel very uneasy. She asked the dean of the Academic Affairs Office for help, but the dean told Shu Ling a piece of news that shocked her -...