It is 1859, and novice detective Campbell Lawless has just arrived in London. He is summoned to the scene of a deadly act of sabotage at Euston Station by the illustrious Inspector Wardle. Wardle believes that the man found dead amidst his handiwork is the culprit, but Lawless is not so sure. So begins his hunt for elusive revolutionary Berwick Skelton. Aided by a gang of street urchins and a vivacious librarian, Lawless must capture his underworld nemesis before Skelton unleashes his final vengeance…