Suffering public contempt after the Metropolitan Police's failure to capture Jack the Ripper, Walter Day, a member of Victorian London's recently formed "Murder Squad," partners with Scotland Yard's first forensic pathologist to track down a killer who is targeting their colleagues.

Hunting down four escaped convicts in late-19th-century London, Walter Day, Nevil Hammersmith and their colleagues from Scotland Yard's Murder Squad race against time to prevent attacks on their families, an effort that turns more violent when Jack the Ripper joins the gang.

"Many changes have happened to the Murder Squad. Rash actions have cost Sergeant Nevil Hammersmith his job, and in response he has set up his own private detective agency. Inspector Walter Day has been missing for a year, and no one knows where he is--though there is a strong suspicion that Saucy Jack has him. Hammersmith has made finding Day his primary case, and he has company--a pair of bounty hunters, a man and a woman. It is only gradually that...