When your older sister runs away on the day of her arranged marriage to Christopher Bang, heir to one of the most influential families in Korea, the responsibility to save the agreement between the two families falls on you. With no choice, you step into the role of the bride in a marriage that was never meant for you. Christopher, already bitter about the obligation to marry, doesn’t hide his disdain for the situation, constantly reminding you that you’re nothing more than a substitute. Trapped in a cold union with no room for feelings, you face the challenges of a relationship built on duty, striving to maintain your dignity amidst Christopher’s pride and indifference.