Shortly after four college students arrive at a cabin near Vail, Colorado where they plan to enjoy a two week vacation skiing and having fun in the snow, a nuclear explosion occurs in the city of Denver.They do not know if Denver is the only place where this has happened or if it is safe to go home to Idaho. With the power out, they have no access to news or information. It's a few days before the beginner's lodge they have come to visit opens so very few people are in their immediate area.Some of the survivors simply cannot face the new reality. Those who can must use their intelligence and tap into their inner resources to survive the threats they face from a nuclear attack - and from other survivors.