High school student Ra Eun Ho dreams of going to college with her older crush, but her grades are a major hindrance. Classmate Hyun Tae Woon fails to impress his father, while top student Song Dae Hwi is more than meets the eye.
The principle offers merit points to anyone who reports the identity of X. Eun Ho learns of a contest that could potentially guarantee her acceptance to Hanguk University.
Tae Woon takes the fall for the math competition fiasco, but manages to bring the principal down with him. Meanwhile, tensions rise and the school is at risk for an official investigation.
The chairman plots to drastically resolve the X issue, and while both Tae Woon's and Eun Ho's futures are threatened, Eun Ho decides to take the matter into her own hands.