Song Sarang a girl with dark and mysterious past ,dark secrets,painful memories and scars on her heart which will take a lot of time to heal and on other side The Kim Brothers Goofy,Happy,Cheerful,Caring and Loving But what Happens when Sarang's mother Song Hye-kyo and Kim Dongwook the father of Kim Brothers gets married? Will they accept her? Will they give her the sibling love she is longing for? And what will happen when the secrets will start to unfold?