As the 16 year old Grace runs away from her abusive onkle, she ends up at an old and mysterious castle. Luckily, the earl who is the resident of the castle needs another maid so Grace starts working there. Soon after, she meets his son, prince henry and his daugther, princess Mary. They both start getting to know her and are surprised how smart and friendly Grace is. Unfortunately, they get jealous and force her to choose between them. Who will she choose? Who gives her the love she deserves?