Ji Soon-young loses her husband, Wang Se-joon, in a tragic accident. She is left alone to take care of their adopted daughter. She meets and falls in love with Han Kyu-jin, who happens to be the father-in-law of her friend and former sister-in-law, Wang Se-bin. Their lives change when Soon-young marries Kyu-jin and becomes Se-bin's mother-in-law. They have to adjust to their new roles in the family and try to get along with each other.
