Kang In-Kyu’s father was brutally murdered 13 years ago. To take revenge on those who are responsible for his father’s death, he becomes a doctor. Kang In-Kyu volunteers at a prison medical office where the murderer is imprisoned.

One peaceful morning, while young mother and little daughter lounge around, the phone rings. Mother hurriedly prepares to go out as picking clothes and putting on makeup. But her daughter starts whining claiming she wants to stay home for the day. In the end, daughter goes inside the bathroom and locks the door. When mother drags out her daughter in her sleep, the doorbell rings. What’d be her choice?