Yoon Do-hyun, a genius Taekwondo star who received rave reviews from the world through his undefeated championship in the past!
However, with the death of his grandfather, who was his mentor and mentor, he collapsed overnight.
At the persistent suggestion of Ha Dong-sik, his grandfather's old friend, he takes up a position as a taekwondo instructor at Jeong Myung Che High School.
At Jeongmyeongche High School, the den of troubled children, Do-hyeon fatefully meets Cha Jun-ho, a student who reminds him of his past, when he was in the limelight as a genius but fell...
The goal of the Taekwondo club is to compete in the World Taekwondo Hanmadang and win the championship.

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