A beautiful night. Clear sky. Billions of stars. The perfect recipe for romancea]until disaster strikes. Jericho Mann and River Coleman just made a discovery that is going to change everything. The world is going end. A comet is hurtling towards Earth and the only hope lies within the Rocky Mountains. Caves have been prepared to house a small percentage of the population. And itas up to two teenagers from Fort Prince, Colorado, to decide who lives and who dies. Not all will be selected. Most will die. And so the question becomes, who will survive the last summer?