Kang Ji Won is married to Park Min Hwan, but their marriage is troubled due to Min Hwan's selfishness and his demanding mother. Ji Won is the primary breadwinner for the family, while Min Hwan is unemployed and in debt. Ji Won also handles all the household chores herself. One day, Ji Won receives the devastating news that she has cancer and not much time left to live. To make things worse, she catches her husband and her close friend, Jung Soo Min, having an affair. A physical struggle ensues, resulting in her tragic death at the hands of her husband. Suddenly, she wakes up in the past, 10 years earlier, when she was dating Min Hwan. Determined to change her life, she decides to make Soo Min marry Min Hwan. Meanwhile, at work, Yoo Ji Hyeok, who serves as a chief in the same department as Ji Won, has feelings for her and slowly begins to reveal them. He also harbors a secret.