After retirement, the frail teacher Park (played by Wu Meixi) lived in seclusion on the seaside away from human habitation. The female student Miko (played by Xu Yingji) who took in a year ago proposed to hold a class reunion to make the teacher happy. The students who came to the party were strange: the class monitor Seho (played by Yu Xianxiu) who was about to get married and the deputy class monitor Eunyoung, the hot-bodied Sunji (played by Li Zhixian), the lame Dafeng, the handsome Minghao, etc. came to the teacher, but they were all resentful because they had been hurt by Teacher Park. When Zhengyang was a child, his mother was hit by a car and killed when she went to the teacher to argue. That night, after accusing the teacher of hurting them, the group of students were killed one after another by people wearing Zhengyang's clothes and rabbit masks. Only Teacher Park and Miko who tried to protect her survived. During the investigation, the police found that Teacher Park did not have a student named Miko, and terror gradually arose. Whose dark memory ruined all this? The truth of the matter is very different from what you see on the surface.