Working-class Jane Andrews wants more for her life and is unlucky in love. On the brink of losing all hope, Jane receives a letter inviting her to interview for a job with Sarah, the Duchess of York at Buckingham Palace. Securing the job, she moves to London – but life in the palace is gruelling and Jane struggles to fit in. In an unexpected moment of vulnerability, Jane and Sarah find common ground in their experiences of love and betrayal, and the two begin to form a close bond.