The story focuses on the conflicts between the young teachers and the problems that high school students have. Jang Yi San (Yang Dong-Kun) is a timid and incompetent homeroom teacher who has to teach the only daughter of a highly dangerous mob leader, Jae-kon Yu (Park Jun Gyu). Eun Byul (Park Min-Young) is a new student at MyungMoon High with little drive to succeed.

The story focuses on the conflicts between the young teachers and the problems that high school students have. Jang Yi San (Yang Dong-Kun) is a timid and incompetent homeroom teacher who has to teach the only daughter of a highly dangerous mob leader, Jae-kon Yu (Park Jun Gyu). Eun Byul (Park Min-Young) is a new student at MyungMoon High with little drive to succeed. [ Contract ]