Kang Ji-won, a terminally ill cancer patient, is killed by her husband and best friend after she witnesses them having an affair. She wakes up 10 years before the incident and decides to seek revenge with the help of Yu Ji-hyuk, a director at the company where she works. Now, she must reclaim her fate and eliminate the trash from her life.
Ji-won has gone back 10 years in time and learns that events will unfold as they are meant to according to the law of destiny. In an attempt to pass on her fate to Su-min, she tries to set up her future husband, Park Min-hwan, with her... However, Su-min's sly manipulation becomes more apparent to Ji-won, and now it's her turn to counterattack!