Enola Holmes returns, hunted by day by the Great Detective and haunting London's befogged cobbles by night in her alter ego as the Sister of the Streets, doling out charity disguised as a nun. She maintains daytime alter egos as Miss Ivy Meshle, and Mrs Ragostin the young wife of the imaginary Doctor Ragostin - seeker of things lost. One of the first consultee's turns out to Doctor John Watson in connection with a missing girl. The story incorporates plenty of Victorian talking points regarding social issues for young readers to discuss or investigate further; social Darwinism, Marxism, emancipation. Mesmerism and some not fully developed theories about the dangers of correcting which hand the Lady Cecily uses and connections with multiple personality disorders aren't perhaps as clearly expounded as they could be. Beyond the social horror of poverty in Victorian England Enola cuts a rather lonely figure herself. She has few confidantes and those she has are handled with caution lest she give herself away to her brothers. Her skills with codes and cyphers almost surpass Sherlock and her sketching of caricatures help her along like early mug-shots. A much improved adventure that tries to be fun, establishing a fresh identity amongst so much obvious historical hardship.