London, 1882. When 14-year-old Emil's cousin goes missing amidst a string of murders, he manoeuvres himself onto the case with his guardian, inspector Corwin James of Scotland Yard. Through careful examination of the suspicious notes left at the crime scenes and of the unsettling pattern the deaths take on, the two begin to piece the curious murders together into a case with more questions than answers. Who is behind the Wonderland Murders? What do all the victims have in common? And can the murderer be stopped? As Emil draws closer and closer to discovering the truth, it becomes clearer by the minute that the case is more personal than he wants to admit. Though he tries to avoid it, the more he investigates, the more the past forces itself into his consciousness, and what he learns will take him down the rabbit hole—again. Does he have it in him to stop the Mad Hatter and to save himself?