It is a story of high school students who become tangled in a series of conflicts and events that challenge human values and morality. Jisoo (Kim Dong-Hee) is a model high school student. To pay for his university tuition fee, he makes a bad choice. This leads to a serious crime that takes place. Minhee (Jung Da-Bin) and Gyuri (Park Joo-Hyun) attend the same high school as Jisoo and they get involved in Jisoo's crime.