Onafrozenhighway,heroicstatetroopersbattletosavedriversandeachotherfromimminentdisaster.AnextremesnowmobilerisridingwithfriendsintheCanadianwildernesswhenheisswallowedbyahiddencrevasse.Hesurvivesan80feetfall,butfindshimselfstuckbetweenverticalwallsofice.Anafternoondrivegoeshorriblywrong,leavingonemanlost,aloneandmilesfromnowhereintheswelteringheatoftheArizonadesert.