Claycie, who must marry to inherit her fortune, repeatedly loses her chance at romance due to the interference of her niece, Meren, who is nearly the same age. Eventually, Claycie meets a man like a stroke of fate and marries him after finding true love. However, during their happy newlywed life, a jealous Meren travels back in time. In this new life, Meren goes as far as stealing Claycie's husband. Claycie, who had always been pushed around by Meren, declares that if Meren steals her husband, she will steal Meren's husband in return!

Having swapped husbands after the regression, a bitter love square begins, fueled by sharp psychological warfare between an aunt and niece who know each other all too well.