A sleeping derelict is savaged by a huge hound. The headless skeleton of Oliver Cromwell is stolen. A Chinese ship’s steward is mysteriously murdered. And the King of England is threatened with blackmail. A sinister game is afoot, and it’s up to Sherlock Holmes and his devoted crony and chronicler Dr. John Watson to put the pieces of the bizarre puzzle together, in order to keep the British Empire from being torn apart!