A retired hitman whose wife goes on a trip with her friend, and asks him to look after the friend's teenage daughter. Things go awry when he is forced to use a little violence to protect the girl from juvenile delinquents, but then they are found dead and the girl is kidnapped.

Taek-il recklessly leaves home, defying his mother who asks him to go to college. In the unfamiliar neighborhood, he happens to get a job as a delivery man for a Chinese restaurant. And he mingles with new people such as Geo-seok, a chef, and Kyung-ju, a boxer. Meanwhile, Sang-pil, a friend of Taek-il, enters the private loan business to make money. At first, it seems easy to make a big fortune, but soon he finds himself in pain as he faces unexpected things.