A Sherlock Holmes horror movie Sherlock Holmes' most unusual case ever. A Danish prince's girlfriend is being pestered and stalked by a mysterious unknown individual. She succumbs to the mysterious stranger's charms and is soon pregnant with child. The Danish prince's girlfriend gives birth to a mysterious beast that the great Danes call the Hound of the Baskervilles. But Sherlock Holmes has a secret weapon of his own- his own offspring. But in the dark shadows of Baker Street, there is more than something rotten in the state of Denmark. For Sherlock Holmes' secret weapon might just have a dark side of her own.