France, Russia, now England. No land is safe from the temptation to possess the Royal Psalms. Now that D'Eon and his comrades know who has the Royal Psalms, they track the traitor to England. But the thief has friends in powerful places, both in the palace and in the stained glass windows of a church, where an order of dark mystics holds terrifying rituals. While Lia's soul becomes more active in her possession of D'Eon's body, one of the spies comes into possession of something else; a secret letter from the king that reveals no one, not even your sworn sovereign, is to be trusted.