Jong Cheol, who spent his adolescence wandering, puts on the taekwondo dobok he had set aside with the goal of becoming a national team athlete. However, when his younger sister Min Jeong is sexually assaulted, Jong Cheol, enraged, goes to seek revenge but dies in a traffic accident. While Min Jeong is hospitalized after the assault and Jong Cheol suddenly dies, his older brother Jong Min falls into despair. Finally, Jong Min decides to wear the dobok in place of Jong Cheol and become a taekwondo athlete. As Jong Min trains, Jong Cheol's friends mock and hinder him. On the day of the national team selection, Jong Cheol's friends interfere, crushing Jong Min's dream of participating in the selection. However, Jong Min does not get discouraged and clenches his fists in front of his master, making a new resolution.