Jiheon never knew the reason her parents chose to separate because everything seemed to be fine. A couple who have been divorced for 5 years, Gyuri and Jisun, never let their one and only child, Jiheon, live in adversity because of the disaster they gave. They decided to always be in every moment of Jiheon's life and didn't want Jiheon to go through what the children of a divorced couple had to go through.

Jiheon is a psychologist who specializes in family and couples therapy. In the end, Jiheon felt compelled to know the reason behind their divorce after having the experience of hearing the stories of people who were going to separate for the past 4 years.

Gyuri and Jisun opened up their stories and each of them began to reorganize their lives in search of happiness.

"How can you mend a broken heart?"