Peullai, Daedi plot
Ga-pil Jang, in his forties, has a good job in a large company. Nothing beats the happiness of his wife and daughter. However, his daughter is assaulted by Tae-wook Kang, a boy who means a lot to the principal of the school as the best boxer in school. Both threaten and humiliate Ga-pil when he demands heartfelt apologies from the boy and his parents. The next day, out of impotence, he attacks the boy in the schoolyard with a kitchen knife, but is humiliated again. One of the students, the "cool" Seung-suk Go, sees the incident and decides to help Ga-pil by putting him through hard training so that he can get his satisfaction on Tae-wook in a boxing match.