Korean boxing drama. Sang-hwan (Ryu Seung-beom) is an angry young man whose criminal career finds him in juvenile prison, where a guard helps to channel his rage through the study of boxing. At the same time, Tae-sik (Choi Min-sik) is a washed-up former professional boxer who has long passed his peak, and whose family is falling apart under his mounting debts. The only way he can earn money now is by hiring himself out as a human punching bag. These two separate character's lives gradually entwine, as each one tries to find a means of reclaiming their sense of dignity and purpose.