Death Bell

South Korean horror in which an elite class of high school students face a potentially deadly examination.

Much is expected of the students of the Seoul school led by head teacher Chang-wook Hwang (Beom-su Lee); so much so that Saturday study sessions are not unusual - though this one certainly turns out to be.

A class including Yi-na Kang (Gyu-ri Nam) and her best friend, Myong-hyo Yoon (Son Yeo Eun), find themselves locked in an exam hall watching live video of fellow students in perilous situations.

A voice informs them that if they do not answer various test questions correctly the students on the video will be killed.

Those in the hall face a desperate test of their intellect as they strive to keep their endangered fellow students alive and attempt to work out who is torturing them.