After 20 years as childhood sweethearts, Grace Parker files for divorce from Nick Miller in the third year of their marriage. She believes their love has long been worn away by the trivialities of daily life. But when Nick looks at the divorce agreement and wedding ring she hands him, he suddenly goes mad and tries to trap her by his side. Before the divorce, Grace thinks no one in this world is irreplaceable. But after the divorce, Nick shatters his pride, lowers his head, and kneels before her. "Grace, you once loved me. Can't you love me the same way as before?" When the one who stays clearheaded walks away, and the one on top bends down, Grace finally realizes that in this relationship, the one who cannot let go has always been Nick.