For young Lexi Broadmoor and her brother Travis, the detonation not only took away their father, but their future as well. Now stranded on a highway far from home without any survival skills or someone to protect them, staying alive will depend on their wits, a single bug-out bag, and a map to a stranger's house.

With the grid down and a nation quickly descending into chaos, they'll need to hurry, because the lawless are taking over.

But a larger threat looms.

A mysterious foe has set in motion a countdown to a vast plan; unknown to Lexi and Travis, they're part of it.