When a terminal cancer diagnosis reveals her husband’s affair with her best friend, the devastated protagonist is murdered—only to wake up ten years in the past, given a second chance at life. Determined to rewrite her tragic fate, she devises a meticulous plan to ensure her unfaithful husband ends up with her former friend instead. Starring Park Min-young as the resolute heroine, Na In-woo as the perceptive colleague who becomes her ally, Lee Yi-kyung as the selfish husband, and Song Ha-yoon as the manipulative friend, this romantic thriller blends revenge, time-slip fantasy, and workplace drama. As she navigates her new timeline, she must outmaneuver those who wronged her while grappling with unexpected feelings and dangerous consequences. The series delivers a taut, emotionally charged narrative that keeps viewers questioning loyalties and rooting for a satisfying reckoning.