Woo Min is hit by Hyun Tae's bus and dies. As a result Hyun Tae lives a miserable life filled with overwhelming guilt and despair. Jung Wook, Woo Min's best friend, is shocked when he finds out his best friend has died. Yoo Jung can't accept his son's death, and wonders why his precious son is gone. For these three people Woo Min's death is like being trapped in a darkness they can't escape.

Bo Mi's perspective on men and women

Architect Jin Woo gets into a freak car accident on the way to Chuncheon and goes into a coma. Soo Kyung, his wife, hears of the accident and rushes to the hospital. But she finds out that Jin Woo wasn't on his way to Chuncheon for work as he had told her. When she goes to submit Jin Woo's insurance claim, she discovers that a boy named Cho Rok has been added to their family register. Then she gets in contact with a woman who asks her to take Cho Rok and become enraged that her husband had an affair. She goes to Chuncheon to discover the truth and ends up returning home with Cho Rok. Just what has her husband been up to? Could Cho Rok really be a son from an affair with another woman?