Colonel William Reid has returned home from India to retire near his children, who are safely stowed at an academy in Bath. Upon his return to the Isles, however, he finds that one of his daughters has vanished, along with one of her classmates. Because she served as second-in-command to the Pink Carnation, one of England's most intrepid spies, it would be impossible for Gwendolyn Meadows to give up the intrigue of Paris for a quiet life in the English countryside, but when the Pink Carnation's sister goes missing she returns home to investigate.