One will die for every incorrect answer.
In a prep-class for year-end exams, a sadistic killer puts the students through mind-games in order to save each other.
Lee Beom-soo
Hwang Chang-wook
Yoon Jung-hee
Choi So-yeong
Nam Gyu-ri
Kang Yi-na
Kim Bum
Kang Hyeon
Son Yeo-eun
Yoon Myung-hyo
Lee Eol
Security guard
Kim So-hee
Ji-won's mother
Kong Jeong-hwan
Lee Chi-yeong
Ham Eun-jung
Kim Ji-won
Yang Ji-won
Min Hye-yeong
Lee Chae-won
Yeom Ji-hyang
The Shed
2019
The Jester
2023
Guimoon: The Lightless Door
2021
Mourning Grave
2014
Superhost
Ghost Mansion
The Unhealer
Race with the Devil
1975
The Uninvited
2003
The Red Shoes
2005
The Piper
2015
Black Widow
1987
Voice
The Hand
1981
Night Watch
1973
Office
The Chronicles of Evil
The Haunting Hour: Don't Think About It
2007
Stalked by My Doctor
The Cat
2011
