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 Edinburgh 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 grey and discover the footprints of a gigantic hound. Could the two mysteries be connected?
These strange clues lead them to a series of robberies carried out by the sinister Gravediggers' Club and soon they find themselves pitted against the villainous Colonel Braxton Dash.
Will Artie survive his encounters with graveyards and ghosts in the foggy streets of nineteenth century Edinburgh -- or will his first case be his last?