Shin Subin, a kind and headstrong young woman who works paycheck to paycheck as a restaurant manager, is tired of how her money either goes to supporting her parents or to paying off the gigantic debt she owes her old schoolmate, Ji Yejun. Yejun approaches her with a proposition: if she agrees to marry him for a year, he'll clear her debt and secure a future for her parents. Subin eventually agrees. As she gets used to her new high-flying lifestyle as the rich Mrs. Ji, she becomes intrigued by her old friend and new husband's past and family environment, and eventually draws him out of his shell.
