The perpetrator's son, the victim's daughter. A twisted fate, an unexpected journey.

Tae-hwa receives a lung transplant from his father, who had committed a hit-and-run the night before the surgery. Riddled with guilt, Tae-hwa sets out to find the victim’s daughter Mi-ji. When he finally meets her, he offers her money to make amends for his father's crime. But Mi-ji demands something else instead: That he would help find her missing mother.