London, 1890. Four vicious murderers have escaped from prison, part of a plan gone terribly wrong, and now it is up to Walter Day, Nevil Hammersmith, and the rest of Scotland Yard's Murder Squad to hunt down the convicts before the men can resume their bloody spree. But they might already be too late. The killers have retribution in mind, and one of them is heading straight toward a member of the Murder Squad, and his family-- Scotland Yard's Murder...

When members of a prominent coal-mining family go missing, Scotland Yard's Murder Squad teammates Inspector Walter Day and Sergeant Nevil Hammersmith, aided by newly arrived forensics pioneer Dr. Bernard Kingsley, investigate dark secrets and realize that the family's village is slowly sinking into underground mines.