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 their needs become her needs. Their lives become hers.

It’s then she meets George, and falls in love for the first time. Now Marion faces an impossible choice: her sense of duty or the love of her life.