 Although not related by blood, Seo Gun (Gong Yoo) and Seo Ha-neul (Sung Yu-ri) are legally siblings after the marriage of Gun's father and Ha-neul's mother.But after the deaths of their parents, the siblings are sent to an orphanage where they tearfully part once they get adopted into different families.In Korea, Ha-neul is a given a new name, Park Hae-won, and grows up in a wealthy, loving family, so much so that she finds it suffocating.