Directed by Cho Jong-tae, the film revolves around Chang Ka-pil (played by Lee Moon-sik) in his 40s, who leads an ordinary life with his adorable wife and their 17-year-old daughter.
He faces a crisis when his daughter is sexually assaulted by a high school boxing star from a rich, well-connected family and he finds no help from the school or police authorities.
To prove that he is not a coward and will do anything for his family, he decides to take revenge and physically beat up his daughter's tormentor. For the seemingly impossible task, he asks Ko Sung-suk (by Lee Joon-ki), a rebellious high school student with talent for fighting, to train him.