This story is about 'desire, mistake, forgiveness, and salvation.' The only power making all of this possible is love. People feel desires throughout their lives. When desires blind us, we make mistakes of making choices we wouldn't have made. That's because we are human beings and because we have to live on and survive. It's not that we were born badly, nor did we have evil hearts. However, sometimes, they demand a harsher price than we have done. Life is about how to take responsibility for mistakes and forgive others.

Eun Ho used to be a swimmer in high school, and now, she's an instructor at a sports center. Eun Ho and Dong Jin fell in love and got married, but they broke up after two years. When their baby was born dead, Dong Jin wasn't around Eun Ho. This made them fall apart, leading to a divorce. Their friends around them try to get them back together. The couple still has feelings for each other, but they keep on missing out on the timing to get back together. Dong Jin's friend, Jun Pyo who's an obstetrician has a secret about the day their baby died. Will this couple lingering with each other be able to get back together after the breakup?