The final film in the series "The Adventures of Sherlock Holmes and Dr. Watson." Underlying - late and little known stories by Arthur Conan Doyle, united by the theme of approaching World War and the legendary detective with foreign spies. <br />The early twentieth century was marked for the British Boer War and the death of Queen Victoria - so ended the days of good old England. Police Scotland Yard and London criminals, armed with electricity, telephone, gas welding, cars and airplanes, do their business at a new stage of civilization. Sherlock Holmes considered himself old-fashioned and retired in Sussex, Dr. Watson delved into care practice. But Watson secretly hoped that someday the great detective re-teach him the object lessons of the deductive method. It happened ...