黑帮头目都锡(郑俊浩 饰)勇猛善战,率领得力手下成滔(郑雄仁 饰)与椰子头(郑云宅 饰)等人将敌对帮派的势力打出了明洞地区。然而在接管明洞的问题上,文化不过关甚至连电子邮件为何物都不知晓的都锡,被帮派同僚认为没有话事的资格。无奈之下,都锡听从大佬安排,进入一所私立高中补习,以期通过大学考试,得到明洞的管理权。 本欲低调处事,顺利毕业的都锡,很快发现学校内的情况不比帮派争斗轻松,暴力师生横行,伪娘与露体狂齐飞,整天吹牛的成滔苦缠女英语老师,胆大妄为的椰子头总为他添堵,美丽的同桌恩珠(吴胜恩 饰)家境贫寒,渴望得到奖学金却面临权贵家小姐的暗算……弃帮从学的都锡,究竟该如何应对这纷乱的高中生涯?When a young gang leader seems to be just a bit too stupid to effectively carry out his daily tasks--embarrassing his gang members and himself frequently--his superiors order him to go back to school for his high school diploma. Once situated in the school, posing as a 19-year-old, he soon learns that the school is even more corrupt and vicious a place to spend his days than in his gang. After he can't stand it any longer, he decides to stop playing "the innocent student" and unleashes his wrath on the place.