Wyoming game warden Joe Pickett is fly-fishing with his two daughters when he stumbles upon the mutilated body of a moose. Half the animal's face has been sliced away, the skin peeled back from the flesh. Shaken by the sight, Joe starts to investigate what he hopes is an isolated incident. Days later, after the discovery of a small herd of mutilated cattle, Joe realizes this is something much more terrifying than he could have imagined. Local authorities are quick to label the attacks the work of a grizzly, but Joe knows otherwise. Soon afterward, Joe's worst fears are confirmed. The bodies of two men are found within hours of each other, in separate locations, their wounds eerily similar to those found on the moose and cattle. There's a vicious killer on the loose--and it appears his rampage is just beginning.