When a stranger claims that Prince Charles is his father, Charles questions who will be second in line to the throne after him. Wills and Kate shun their royal life and move to her dream semi in Rickmansworth. A pregnant Camilla, however, has other ideas... Meanwhile, Beatrice and Eugenie do the parent trap to try to get Fergie and Andrew back together again, but an international PR crisis looks set to end any hope of reconciliation. Pippa is seriously miffed when Prince Harry looks set to marry the Australian Prime Minister's daughter - can Harry save the Commonwealth? Will best man Prince Edward remember the rings? Or will the funny feeling in Harry's tummy turn out to be more than IBS?

Wills has become disillusioned with his role and calls for a referendum on the abolition of the monarchy, and the family take sides in a battle over the nation's future. The younger royals support abolition, while Charles and Camilla fight to maintain the status quo. Camilla resorts to a campaign of dirty tricks and uncovers some shocking news about Kate.