When Prince Harry arrives at Balmoral to convalesce after a bungee-jumping accident in Bali, he is accompanied by Sister Julia, a plain looking nurse who dotes on her charge.
Julia's behavior provokes instant dislike and suspicion in two senior royal servants, the formidable housekeeper Janet MacDuff and Prince Charles' equerry David Baron.
Julia seems to know her way around the castle when she first arrives, and the famous corgis tumble at her feet in a loving pack.
Furthermore, she greets Prince William as if she has known him all his life.
When a sapphire engagement ring, recently bestowed on Camilla, is discovered under Prince Harry's bed, Julia acts as though she recognizes it.
The arrival of an unscheduled visitor at the Queen's wild-boar sausage barbecue tests Her Majesty's royal composure, and Julia is accused of spying on Charles and Camilla.
This witty and sympathetic account of Sister Julia's experiences among the castle's frosty inhabitants provides merriment and insight.