Dolby Digital True HD7.1 / Dolby Digital 5.1
Language : Korean, Cantonese
Subtitles : Traditional Chinese & English
Running time 85 minutes
The film is set in a high school, where an elite group of twenty students?including rebellious heroine Kang Yi-na, her timid best friend Yoon Myong-hyo, and her would-be boyfriend Kang Hyeon?are taking a special class for their college entrance exam. After Kang Yi-na is nearly strangled and another student throttled in the restroom, the classroom TV screen switches to an image of top-ranking student Hye-yeong trapped inside a fish tank that is slowly filling with water. A disembodied voice announces that her life depends on the exam questions he will set for them, and that a student will die for every question the class gets wrong. Trapped with the students are head teacher Hwang Chan-wook and English teacher Choi So-yeong. Yi-na realizes that the students are being killed in order of their rank in the class, and she is ranked fifth. The movie ends with Yi-na walking across the corridors then takes a look at the TV monitor which showed the ranks of the mid-term exams. It showed her name was ranked number one, Yi-na turns around to face the camera then transforms to her deceased best friend/room-mate who is smiling then changes back to Yi-na and then the screen fades to gray then black and the credits roll.