Kang Ji Won is married to Park Min Hwan. Her married life is not going well due to her selfish husband and demanding mother. Kang Ji Won is the breadwinner of the family, while her husband Park Min Hwan is unemployed and in debt. Kang Ji Won also does all the housework herself. One day, Kang Ji Won finds out that he has cancer and that he doesn't have long to live. To make matters worse, she witnesses her husband and her close friend Jung Soo Min having an affair. She gets into a physical fight with the two and is killed by her husband Park Min Hwan. The next moment, Kang Ji Won opens his eyes and finds himself in the past, 10 years earlier, when he was dating Park Min Hwan. He decides to change his life by making Jung Soo Min marry Park Min Hwan. Meanwhile, Yoo Ji Hyuk works as a boss in the same department as Kang Ji Won. He is in love with her and little by little he reveals his feelings to her. He also has a secret.