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