It's 1919, and Louisa Cannon dreams of escaping her life of poverty in London, and most of all her oppressive and dangerous uncle. Louisa's salvation is a position within the Mitford household at Asthall Manor. There she will become nurserymaid and chaperone to the Mitford sisters. But then a nurse is killed on a train in broad daylight, and Louisa finds herself entangled in a crime. The first novel in a Golden Age-style mystery.