In a small Montana town, it takes four minutes for every man, woman and child to die. It isn’t a virus or biological attack, but rather the beginning of a geological event that triggers a chain reaction across the globe with devastating effects. A repeat of an extinction event that occurred millions of years earlier. There is no stopping it. The only way to survive is to stay ahead of it. Tom Foster hasn’t flown in decades, yet, he sets his fear aside for a vacation with his grown sons. When the global catastrophe begins, Tom and his sons are in the safest place they could possibly be … thirty thousand feet above the ground. No matter the sacrifice, keeping his family alive is his number one priority and the only way to do that … is not to land until it is safe. With billions dying on the ground, it’s a race to achieve the impossible because there is no other alternative if they want to live.