Cab driver Roger Maple wakes from a five-year coma to a world defeated by an alien invasion during his long slumber. The remains of the human race are docile slaves unable to think for themselves. So when their masters flee from yet another alien threat, the human race huddles in waiting for the end. Desperate to do something besides duck and cover, Roger embarks on a quest to find his wife and son. But his journey offers glimpses of a dire threat left behind by the slaveholders...