A Greek interpreter stumbles upon a mysterious kidnapping. An important treaty is stolen from a young diplomat. A doctor is befriended by a generous but mysterious patron and the net slowly draws closer around Professor Moriarty-the Napolean of crime. These and other baffling mysteries are brought to the house on Baker Street-the home of master sleuth Sherlock Holmes. No case is too tricky for the world's most famous detective and his incredible powers of deduction.