(ENG SUB) KOREAN MOVIE 'DEATH BELL'

A group of 20 high school students partake in an elite class to prepare for a college exam. Among them are the rebellious Kang I-na, her best friend Yoon Myong-heo, and the class clown Kang Hyun, who harbors an affection for I-na. A few days after incidents involving a student, Beom sees a ghost haunt his paper and class teacher Hwang Chang-wook discovers scars on his hand. The class is interrupted by a TV showing the top-ranking student, Min Hye-yeong, being trapped in a glass being slowly filled with water. A voice over the PA system announces they are part of a death game with questions that will be posed to the class; failure to answer them in time will lead to the student's death. It also warns them and their two teachers, Hwang Chang-wook and Choi So-yeong, against leaving the school. The class fails to solve the first question to save Hye-yeong.