The third book in the Royal Spyness Series about a minor royal, Georgie, thirty-fourth in line for the throne, penniless and trying to make it on her own in 1930's England. When a scheme to drum up money by being a suitable dinner companion for male travelers goes terribly wrong, she hightails it up to the family home to find a castle full of guests. During her stay Georgie must keep a watchful eye on the houseguests and is coerced into helping Scotland Yard with a top-secret mission to protect the royal line.