Kyeong Suk married a wealthy older man at 19. After losing both her husband and mother-in-law, she comes to depend on her son, Jeong Su, a doctor. When he introduces his girlfriend, Hyeon Ju, Kyeong Suk disapproves of her humble background. Despite the tension, the couple marries — but Kyeong Suk continues to make Hyeon Ju's life difficult.

After Jeong Su dies in a car accident, the two women go their separate ways. Years later, fate takes a surprising turn when Kyeong Suk remarries — only to become Hyeon Ju's daughter-in-law.