Season two follows Queen Elizabeth through the late 1950s and early '60s as she struggles to navigate a world that's changing around her. She must face the challenges of a new era, from the Suez Canal crisis to the assassination of John F. Kennedy, while preserving both the monarchy and her marriage.

When a gifted ghostwriter is hired to write the memoirs of former British Prime Minister Adam Lang, he quickly finds himself trapped in a web of political and sexual intrigue. Lang is implicated in a scandal over his administration's harsh tactics, and as the ghostwriter digs into the politician's past, he discovers secrets that threaten to jeopardize international relations forever.

The story is about England's Ambassador to Ireland, one of the country's most coveted and dangerous Embassy posts. Supported by her Commercial Attach ̌and MI-6 operative John Stone, Harriet uses both diplomatic skill and common sense to bravely face issues ranging from territorial disputes, kidnapping and cults to sabotage and murder.

Prime Minister Robert Sutherland's committee, comprised of leading contingency planners and senior politicians, navigates the difficulties in overcoming a major national crisis.