Kept locked inside the house by her father, 7-year-old Chloe lives in fear and fascination of the outside world, where Abnormals create a constant threat - or so she believes. When a mysterious stranger offers her a glimpse of what's really happening outside, Chloe soon finds that while the truth isn't so simple, the danger is very real.
In the near future, breathable air is nonexistent. Virtually all of humanity has disappeared, and those chosen to reestablish society reside in a controlled state of suspended animation. Two engineers tasked with guarding the last hope for mankind struggle to preserve their own sanity and lives while administering to the vital task at hand.