Two years have passed since the nuclear explosions, ushering in a future devoid of fuel and electricity, where civilization has descended into chaos. In this harsh new world, survivors Kate, her husband Sam, and their daughter Suzi are on a quest to find a rumored bunker said to be stocked with food and medical supplies. Along their journey, they encounter the lone figure of Joe, whose intentions towards the group are questionable. Kate must go to great lengths to ensure the safety of her family.