In the middle of nowhere, with only a two-lane highway to connect to anywhere, recently divorced Stacia, a passenger on a broken-down bus, gets caught in a bizarre and violent turf war between serial killers.

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.