Kat Holloway knows that her beau and confidante Daniel McAdam has a talent for dangerous work as a Scotland Yard agent. At long last though, Daniel's coldhearted boss has promised that after a final mission, his debt will be repaid, and he'll finally be free. However, Daniel must risk his life one last time, masquerading as a secretary to an elderly viscount who could be the mastermind ready to bring down the Queen and her government.

Using her contacts throughout London, Kat discovers several of the viscount's friends and colleagues have been victims of vicious blackmail. They'll do anything to protect their scandalous secrets, but Kat will do anything to protect the man she loves. If they wish to save both each other and the Crown, Kat and Daniel must track the blackmailer and evade those who will stop at nothing to eliminate them.