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...