Yoo Ra suffers from nightmares every night. One day she meets her high school friends. Jin Tae is a promising artist, In Seok is a chaebol and former thug, Hye Jin likes In Seok, and Seong Ho, who used to be In Seok's errand boy, finally meet up. Yoo Ra asks her friends if they remember the classmate that killed herself. Everyone is flustered and claims they don't. Yoo Ra goes to the bathroom but passes out after seeing herself in the mirror. Everyone gets in In Seok's car to send Yoo Ra home, but they get into an accident and all become unconscious. When they wake up, they are at a familiar school that's closed. It was the school they went to that has closed down. Why did they end up there? Yoo Ra and her friends tremble in fear for their lives...