"Dark and deadly and halfway to hell." This is London’s Underground Railway, and the description proves only too true in 1895. The murder of Sarah Culdrose is just the first in a series of mysterious and often gruesome deaths that the city’s subterranean trains will witness. The deceased – all women – pile up quickly. There is a maniac at large, and Inspector Sholto Lestrade of Scotland Yard is detailed to work with the Railway Police. The detective plunges through a tangled web of deviants to solve a string of murders so heinous that every woman in London fears for her life. Will the London Transport System survive? Or will Lestrade run out of steam?