剧情： On a frozen highway, heroic state troopers battle to save drivers and each other from imminent disaster. An extreme snowmobiler is riding with friends in the Canadian wilderness when he is swallowed by a hidden crevasse. He survives an 80 feet fall, but finds himself stuck between vertical walls of ice. An afternoon drive goes horribly wrong, leaving one man lost, alone and miles from nowhere in the sweltering heat of the Arizona desert.