A series of occult events mystifies the man known as the Witchfinder, but even more surprising is the revelation that he is not alone in exploring the paranormal in London. When a personal invitation arrives from the palace, Sir Edward Grey is pulled even deeper into underground supernatural exploration alongside new allies in the race to stop a mad scientist from destroying London in his pursuit of mystical power.

''Though the works and mythos of Mike Mignola are vast and complex, the Witchfinder franchise succeeds due to its accessibility.''—Newsarama