1864. London is a city in transition. The Constantine Affliction-a strange malady that kills some of its victims and physically transforms others into the opposite sex-has spread scandal and upheaval throughout society. Scientific marvels and disasters, such as clockwork courtesans, the alchemical fires of Whitechapel, electric carriages, and acidic monsters lurking in the Thames, have forever altered the face of the city.Pembroke "Pimm" Hanover is an aristocrat with an interest in criminology, who uses his keen powers of observation to assist the police or private individuals-at least when.