In a prep-class for year-end exams, a sadistic killer puts the students through mind-games in order to save each other.

Top Cast

Lee Beom-sooHwang Chang-wook

Yoon Jung-heeChoi So-yeong

Nam Gyu-riKang Yi-na

Kim BumKang Hyeon

Son Yeo-eunYoon Myung-hyo

Lee EolSecurity guard

Kim So-heeJi-won's mother

Kong Jeong-hwanLee Chi-yeong