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. The stakes get even higher for them when an old enemy appears—a threat that may be deadlier than any bogle.