In a prep-class for year-end exams, a sadistic killer puts the students through mind-games in order to save each other.
as Hwang Chang-wook
as Choi So-yeong
as Kang Yi-na
as Kang Hyeon
as Yoon Myung-hyo
as Security guard
as Ji-won's mother
as Lee Chi-yeong
as Kim Ji-won
as Min Hye-yeong
as Yeom Ji-hyang
