A Montana rancher shoots a snarling, bloodthirsty beast on his property'only to find that he's killed a Trego Indian from the neighboring reservation. When FBI Agents Fox Mulder and Dana Scully investigate, they're forced to a single, outrageous conclusion: The Trego man and the wild beast are one and the same. Is there a more logical explanation'or have Mulder and Scully uncovered a terrifying tribal secret?