In the first episode, with remarkable archival footage, the documentary tells the childhood story of the young girl who never expected to reign. It looks closely at the influence of her grandfather, father and mother and the impact of the abdication. And it hears from Princes William and Harry, and Princesses Beatrice and Eugenie about what it must have been like to become queen at the age of 25 and about the remarkable skills The Queen has acquired in 60 years of walkabouts, state visits and receptions.