本片根据日本漫画《龙樱》改编，讲述的是一个暴走律师使偏差值只有36的落后的高中学生们，顺利考入东京大学的感人故事，故事的取景是龙山高中。

Sakuragi Kenji is a destitute lawyer and one-time member of a motorcycle gang trying to guide failing high school students with an average score of 36 into Japan's most prestigious educational institution, Tokyo University (Toudai). For no other reason than Sakuragi's personal ambition, he has advertised his intention to produce 5 successful Toudai applicants from the students of a nearly bankrupt failure of school. In addition to revealing essential test-taking techniques for everyone who wants to know how to get into Toudai, "Dragon Zakura" will also teach the essentials of living one's life.

元暴走族の弁護士、カン・ソクホのもとに久しぶりに依頼が舞い込む。それは破産危機に直面したピョンムン高校の法人清算の仕事だった。だが、ソクホは三流高校として有名なピョンムン高校を、名門校に変えることで危機を回避させるという計画を立てる。韓国最高の名門大学、天下大学への合格者を5人出すこと。そこでソクホは、6月の模試までに天下大学志願可能点数の70%に達する条件で特別進学クラスを作る許可を得る。