Kang Ji-won, une patiente souffrant d'un cancer en phase terminale, meurt des mains de son mari et de sa meilleure amie après avoir découvert leur liaison. Elle se réveille dix ans avant l'incident et décide de se venger avec l'aide de Yu Ji-hyuk, un directeur de l'entreprise où elle travaille. Elle peut désormais reprendre son destin en main et se débarrasser des ordures dans sa vie. When Ji-won, a 37-year-old cancer patient, walks in on her husband and best friend, she realizes her whole life has been a lie. What’s worse, she dies a tragic death at the hands of her husband. Would things have been different if she had made different choices? Fortunately for Ji-won, she is given the chance to rewrite her fate when she is reincarnated as her younger self. This time, she vows to live a happy life. But first comes revenge. Her plan? To marry off her now former best friend to her lying, cheating husband.