The Kern Secretarial Agency provides reliable professional services to its wealthy clientele, and Anne Clifton was one of the finest young women in Ursula Kern's employ. But Miss Clifton has met an untimely end -- and Ursula is convinced it was not due to natural causes. Bent on justice, Ursula hatches a plan: take Anne's place as stenographer to the reclusive poet Valerie, Lady Fulbrook. There are dark rumors about Lord Fulbrook, and his gloomy mansion in Mapstone Square seems the logical starting point for an undercover investigation.