<p>DavidPetersenispassingthroughtheColoradoRockies.Aftersavingayoungdinerwaitressfromherviolentex-husbandduringabreakfromdriving,hehitstheroadagainalonethroughadangeroussnowblizzard.Onefalsemovebehindthewheelhashimwakingupinsidearavine,intheeyeofthestorm.Butthecoldistheleastofhisworrieswhenabeaststartsprowlingoutsi...</p>