Maisie Dobbs entered domestic service in 1910 at thirteen, working for Lady Rowan Compton. When her remarkable intelligence is discovered by her employer, Maisie becomes the pupil of Maurice Blanche, a learned friend of the Comptons. In 1929, following an apprenticeship with Blanche, Maisie hangs out her shingle: M. Dobbs, Trade and Personal Investigations. She soon becomes enmeshed in a mystery surrounding The Retreat, a reclusive community of wounded World War I veterans.