1932. Dunfermline, Scotland. Marion Crawford, a bright, ambitious young teacher, is ready to make her mark on the world. Until a twist of fate changes the course of her life forever… 1936. Windsor Castle. At first this ordinary woman is in a new world, working as the governess to two young princesses, in a household she calls home but where everyone is at a distance. As the course of history changes, she finds herself companion to the future Queen, and indispensable to the Crown. And slowly thei