While taking a moonlight stroll at a house party, Miss Jane Colborne stumbles upon a notorious rake spying on French traitors, turning her dull life as a spinster into one of adventure with plenty of intrigue. Owen Sheffield, Earl of Blackmore, works for the Home Office and is currently assigned to discover a traitor among the aristocracy. On a moonlit night, he’s forced to pluck the most delectable spinster out of harm’s way and into the shrubbery, where he’d been spying on two French émigrés. Now his job becomes doubly difficult, for he must keep his eyes on, but his hands off, the infuriatingly inquisitive Miss Colborne who poses an even greater threat to Blackmore, this time to his heart.

Lady Meghan Charlton, a bluestocking who can’t see without her spectacles, takes up residence with Lady Farringdon for the Season and becomes embroiled in her matchmaking hostess’s plan to keep the Earl of Daventry from proposing to a young debutante. Unfortunately, Lady Farringdon refuses to let Meg wear her spectacles, as she is convinced that is why Meg is still unwed. Julian, the Earl of Daventry, has decided to marry a biddable young lady but is constantly foiled in his attempts to propose by the lovely, but extremely clumsy, Lady Meghan. It isn’t long, however, before he finds her intelligence and sensibility far more appealing than the ingénue he’d chosen.