When Charlotte Bingham, daughter of an obscure aristocrat, was summoned to her father’s office aged 18, she never expected to discover that this aloof, soberly-dressed parent was a spy. Even more ominous than The Facts was his suggestion that she should stop drifting around working for the sort of people her mother could never ask to dinner and get a proper job, something patriotic and worthwhile. So Lottie finds herself outside MI5’s Mayfair offices in a dreary suit, feeling naked without her false eyelashes. Miserably assigned to the formidable Dragon, Lottie wishes for pneumonia, or anything to release her from the torment of typing. But as another secretary, the serene Arabella, starts illuminating the mysteries of MI5, and Lottie’s home fills with actors doubling as spies, Lottie begins to feel well and truly spooked.