Du-shik,
a young mobster aiming for a promotion,
needs a high school diploma. He enrolls, keeping his identity secret with help from his crew, Sang-du and Ga-ri.
He befriends Yun-ju, a struggling student, and witnesses the school’s deep corruption, including grade fixing and the principal’s abuse of power.
Mobster needs diploma,
goes to high school, uncovers corruption,
reveals his identity in a brawl,
and ends up with a diploma and a suggestion to go to college.
