"Sir – Our client, Mr. Robert Ferguson, has commissioned us to conduct an investigation regarding VAMPIRES. As our office specializes exclusively in the evaluation of machinery, unfortunately, we cannot provide advice on this particular issue. Perhaps you can HELP." Holmes and Watson take on their strangest case yet. A desperate husband turns to them, through his lawyers, to understand why his wife has become so aggressive towards their children. She has even gone so far as to bite their baby's neck! But there are no such things as vampires... Or are there?