The series begins with the events on April 12, 2023, where Kang Ji-won is terminally ill with gastric cancer. After catching her husband, Park Min-hwan, in bed with her best friend, Jeong Su-min, a scuffle ensues in which Ji-won is accidentally killed by Min-hwan. Ji-won then suddenly finds herself at her workplace in the year 2013, having been sent back in time following the intervention of her late father's spirit. As she relives her life with the same knowledge and information as in the previous timeline, she discovers that in order to live a better life, she must transfer her misfortune to others. She then resolves to have Su-min marry Min-hwan in order to exact revenge and escape her miserable fate.