An Unpardonable Sin? England, 1919. Verity Kent's grief over the loss of her husband pierces anew when she receives a cryptic letter, suggesting her beloved Sidney may have committed treason before his untimely death. Determined to dull her pain with revelry, Verity's first impulse is to dismiss the derogatory claim. But the mystery sender knows too much-including the fact that during the war, Verity worked for the Secret Service, something not even...