When Park Shin Hye, a 37- year -old cancer patient walks in on her husband and best friend, she realises her whole life has been a lie. What's worse, she dies a tragic death at the hands of her husband. Would things be different if she had made different choices? Fortunately for Shin Hye, 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.

The story is not mine. All the credit goes to the original creator LICO.