In the northwest border country, settlers and natives are vanishing, never to be heard from again. The answer to the mystery mght lie in an old Indian tale of ferocious inhuman creatures from the sea. For ages they have raided and pillaged without mercy, slaughtering their prey with a mad bloodlust. No one has ever fought them and lived to tell about it. Now, at the request of a secret government agency, Skye Fargo must follow a treacherous trail through ancient myths and cold-blooded murder if he wants to track down the true monsters behind the mayhem. And when he does, the Trailsman is going to take hard aim at these fiends of legend - and make them history.