The greatest detective of them all is back... 'It is the Valley of Fear, the Valley of Death. The terror is in the hearts of the people from the dusk to the dawn. Wait, young man, and you will learn for yourself'. A coded message summons Sherlock Holmes to the aide of one Mr Douglas. But before Holmes can reach him Douglas is found dead. He recognises the calling card of his nemesis, Professor James Moriarty - this was most definitely murder.