'Geon-woo', brutally trampled by Daejinbuk High's best 'Sang-goo', vows revenge as he practices martial arts. After hearing about 'Geon-woo's comeback, 'Sang-goo' immediately starts to threaten and ask for bribes. To stop 'Sang-goo', they fight head-to-head. To determine who is the real 'best', the bloody fight begins!

Geon-woo used to be a promising taekwondo athlete, but quit after kicking an unfair judge in the face. On his first day at Deoksang High, he gets involved in a fight with the school bullies, but defeats them and becomes the subject of school gossip. While Geon-woo was previously tired with everything in his life, he slowly finds interest after his fight with the bullies. In the end, he takes over the school by defeating Deok-soo, the school's best fighter. However, Sang-goo, the best fighter of Dae Jin High, asks him for a bribe, but Geon-woo declines him. Sang-goo is not happy and wants to break Geon-woo.

third grade of high school, Undo reigned like a school head. However, the case of the former student Yee Eun collided with the second grade Hyeon - dong of the second grade after the incident, and finally, the fortune is devastated in the battle with Hyodong. The high school students who were overwhelmed by the oppressive attitude of the reigning god like Shin, tried to bring Hyun-dong to the school head, but Hyun-dong was only quietly hanging out with his friends. However, Hyun-dong, who could not watch the luck threatening his friends, prepares for the final duel.