Teenie and high school horror movies were quite popular in North America during the nineties and that vague somehow hit the Asian continent one decade later and many amazing but sometimes also redundant twisted supernatural movies flooded the market. This film goes back to the basics in a refreshing way. The movie keeps the concept of a popular and smart high school student and the morbid and mysterious outsider girl who must resolve the the murder of one of their class mates in only forty minutes during the dinner break before the rest of the class comes back and discovers the body. The two pupils soon find out that not only a couple of class mates but even several teachers had a solid reason to kill the victim who had a couple of sinister secrets. The two main characters who have a good chemistry have to find the true killer before time runs out.
Jae-Hyeok (Kim Nam-Gil) lives with his mother (Kim Young-Ae), his sister-in-law (Moon Jeong-Hee) and nephew Min-Jae (Bae Gang-Yoo) in a small Korean town. He is dating Yeon-Joo (Kim Joo-Hyun), while working at the local nuclear power plant. Meanwhile, Pyung-Sub (Jung Jin-Young) works at the same nuclear power plant. He is worried about conditions there, but nobody in the government listens to him. An earthquake strikes the small town where Jae-Hyeok lives and causes explosions at the nuclear power plant. The situation quickly spirals out of control, leading the entire nation to panic. To prevent another nuclear disaster, Jae-Hyeok and his co-workers return to the nuclear power plant.