An ordinary day in an ordinary campus, a girl who was loved by everyone killed herself. Everyone is asking why, but no one knows the truth, except these three: a good student, a bad student, and a weird student. For they know the truth of this incident, they decide to do something unordinary for her, as a revenge. They are the partners in crime. However, with the discovery of the girl’s secret diary, we are about to journey back to our high school lives. As an old saying goes, “High school never ends!”