Lady Georgiana Rannoch, a distant and impoverished member of the royal family, leaves Castle Rannoch for London after her brother cuts off her allowance. She secretly works as a domestic servant and is asked by the Queen to watch the Prince of Wales, but her efforts to remain discreet collapse when a French claimant to the family estate is found dead in her bathtub.
With suspicion falling on Georgie and her brother, she must discover how the dead man entered her house and who wanted him silenced. Her investigation takes her through aristocratic drawing rooms and the less comfortable realities of Depression-era London while Darcy O’Mara repeatedly complicates both the case and her plans for independence.