They fell in love when they were 13 and 14. Yongsun promised never leave Byul. After 4 years together, the Kims force the daughter to marry a guy they chose and the 18-year-old girl has ten nights to say goodbye to the love of her life.

Life is painful and ten years later, Yongsun and her son meet Byul again in a very sad situation.

Will it be possible for the past lovers keep a civil interaction? Did all the feelings vanish through time?