London, the world’s biggest city in the Victorian era, could be a dark and cruel place, but in the late 1880s it was downright terrifying. Jack the Ripper had been on the loose in 1888, murdering women in mostly impoverished areas. His bloody rampage set Scotland Yard on its ear and forever changed crime. Until then, murders were committed by spurned lovers, cuckolded husbands, greedy partners, or impatient heirs, but not by strangers. People didn’t go around killing those they didn’t know; there would be no reason to do that. But Saucy Jack gave life to the term “serial killer” and the city turned edgy. No one knew where Jack would attack next.