One day Arthur Conan Doyle will create the greatest detective of all -- Sherlock Holmes. But right now Artie Conan Doyle is a twelve-year-old Scottish schoolboy with a mystery of his own to solve. While sneaking out to explore Greyfriars Kirkyard by night, Artie and his best friend Ham spot a ghostly lady in gray and discover the footprints of a gigantic hound. Could the two mysteries be connected? These strange clues lead them to...