In Montana's Gravelly Range, paw prints discovered at the horrific scene suggest a woman had been attacked and carried away into the wilderness by a mountain lion. Sheriff Martha Ettinger employs her fiance, sometimes-detective Sean Stranahan, to put a name to the gnawed bones and single discarded breast implant comprising all that is left of the body, the first of several deaths that perhaps are not as simple to explain as they first appear to be. The gruesome trail will lead him from the ridges of wintry Montana to the sun-scorched foothills of the Indian Himalayas, as Sean finds himself on his most adventurous and dangerous quest yet. For as he comes closer to unearthing the secret shared by the dead and missing, the tracks he is following will turn, and the hunter becomes the hunted.