The British Empire is in decline, the political world is in disarray, and a young woman takes the throne ... a new era is dawning. Queen Elizabeth II is a 25-year-old newlywed faced with the daunting prospect of leading the world's most famous monarchy while forging a relationship with legendary Prime Minister Sir Winston Churchill.

The royal family mourns the passing of Winston Churchill. The United Kingdom ushers in a new prime minister, the Labour Party's Harold Wilson whom Prince Philip and Queen Elizabeth hear might be a Soviet spy. While Princess Margaret and Lord Snowdon visit the USA, the queen, at the bidding of Harold Wilson, asks them to make a side trip to Washington, D.C. to ask President Johnson for financial assistance for the United Kingdom.

John Whittaker is a young Englishman who falls madly in love with Larita, a sexy, glamorous American woman. The two impulsively decide to get married. He takes her home to meet his family, she arrives like a blast from the future. John's mother takes an instant disliking to Lairta and undermines her every move. But Larita will blow their entrenched British stuffiness right out the window.