Teenagers Cody and John Cottrell are shaken awake by a cataclysmic earthquake in the first minutes of December 21st 2012, the day the Mayan calendar ends. They soon discover that zombies are rising from their graves as they battle their way to their home in Sedona, Arizona, to search for their parents and friends. At the same time the Scouts of Troop 274, camped in the wilderness near Lake Powell in Utah are having their own desperate skirmishes with the zombies. Cody and John do not find their parents and head north to Sandy, Utah, to look for their grandparents. Just north of the Arizona-Utah border they join forces with the boys of Troop 274, which has been decimated and lost half their number. Against overwhelming odds they fight their way to the shores of the Great Salt Lake and the ultimate battle for the life or death of mankind.