When Jiwon, 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 Jiwon, 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.

Her best friend and her husband cheated on her. If that were not enough, he killed her, his terminally ill wife. Ji Won, who died like that, miraculously returned to ten years earlier. In order to change her future, Ji Won pledged to hand over her ill fate to her "best friend" Soomin.

'So, marry my husband instead of me.'