With the plague of bogles in Victorian London barely contained, bogle hunter Alfred Bunce needs all the help he can get. So Ned Roach becomes a bogler's apprentice, luring child-eating monsters from their lairs just like his friends, Jem and Birdie. It's dangerous work that takes Ned into mysterious and hidden parts of the city.
Yet times in London are changing; as the Machine Age emerges, the very existence of bogles is questioned, and the future of bogling is in jeopardy. And the stakes get even higher for the team of boglers when an old enemy appears - a threat that may be deadlier than any bogle.