Death Bell

Death Bell (Hangul: 고死: 피의 중간고사; RR: Gosa: Piui Junggangosa) is a 2008 South Korean film. The only Korean horror film released over the summer of 2008, it is the first feature by former music video director Chang (real name Yoon Hong-seung), who also co-wrote the screenplay. Death Bell stars Lee Beom-soo in his first horror film role, and K-pop singer Nam Gyu-ri in her acting debut. Set in a Korean high school, the film's native title refers to gosa, the important midterm exams that all students are required to sit.

Plot

A group of 20 high school students partake an elite class to prepare 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. After several strange incidents, the class is interrupted by a TV showing of the top-ranking student, Min Hye-yeong, being trapped in a glass being slowly filled with water. A voice over the PA system announces that questions will be posed to the class; failure to answer them in time will lead to their 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.