In Victorian London at the height of the industrial revolution, Horatio Lyle is a former Special Constable with a passion for science and invention. He's also an occasional, but reluctant, sleuth. The truth is that he'd rather be in his lab tinkering with dangerous chemicals and odd machinery than running around the cobbled streets of London trying to track down stolen goods. But when Her Majesty's Government calls, Horatio swaps his microscope...