The legendary detective Sherlock Holmes and his trusted associate Dr. Watson investigate one of the strangest cases in their career! With mauled bodies appearing on the streets of Liverpool, rumors circulate that the culprit might be an inhuman monster known as Spring Heeled Jack. Determined to solve the case and debunk the city's superstitions, Holmes delves into the criminal underworld, piecing together an intricate and deadly puzzle. What have crime lord Mr. Drummond, a vicious dogfighting ring, and a museum's Aboriginal artifact exhibit to do with the Liverpool demon's rampage? Meanwhile, Dr. Watson witnesses the creature with his own eyes, and sets out alone in pursuit. Will Holmes be able to save his dear friend from the subterranean perils beneath Liverpool?