Lee Se Na is the only daughter from a wealthy background. Because of her pampered upbringing, she believes that she can get anything she wants if she sets her heart to it. She meets Han Seung Woo, a self-made diplomat, who is not-so-secretly in love with his childhood friend Yoon Su, currently in Japan with her fiance, Seung Woo’s colleague Jin Hui. Se Na instantly falls in love with Seung Woo, whoasks her what she thinks the meaning of marriage is. In their subsequent marriage, their values are questioned as Se Na’s complete trust in Seung Woo shatters with the realization of Yoon Su’s and Seung Woo’s relationship, and Seung Woo’s happiness in marriage shatters with Se Na’s deepening mistrust and her own relationship with Jin Hui.