Sherlock Holmes summons his wife and partner, Mary Russell, from her Oxford studies to the eerie wasteland of Dartmoor to investigate a death steeped in the supernatural. The mist-covered moors are haunted by chilling si...Sherlock Holmes summons his wife and partner, Mary Russell, from her Oxford studies to the eerie wasteland of Dartmoor to investigate a death steeped in the supernatural. The mist-covered moors are haunted by chilling sightings: a spectral coach made of bones and a hound with a single glowing eye. Returning to the site of one of his most legendary cases, Holmes and Russell must untangle a mystery that proves even darker and more unforgiving than the landscape itself.