"Jang Tae San is a small-time gangster who has learnt to survive with his fist and wits, and he has only one friend named Go Man Seok. Oh Mi Sook frequently visits Tae San's pawnshop just to see Tae San. One day, Seo In Hye unexpectedly comes and tells him that their daughter Soo Jin has been diagnosed with leukaemia and needs a bone marrow transplant. She hopes Tae San can agree to do the blood test. Tae San accidentally meets Soo Jin after the test, and they secretly make a promise with each other to take care of Soo Jin's favorite toy. Tae San is about to go to the hospital after he is informed of a successful match, when he is asked to go to Mi Sook's home. However, he is knocked out, and he wakes up to find himself lying in a pool of blood, with Mi Sook's dead body next to him.