Mudosilmugwan plot
Lee Jung-do delivers food for his father's restaurant. He seems like an ordinary boy, who likes to play video games with his friends or have a drink, but he is a martial arts prodigy. When he sees someone in trouble, Jung-do doesn't think twice about helping. One day, when he sees a police officer being attacked, he springs into action. It works out well, and Jung-do then begins a long training to replace the officer.