Taylor MacPherson, a survivor of Earth’s apocalyptic collapse, witnesses a strange light in the night sky, little realizing a leftover space-based rail gun has crippled the alien Qu’uda’s giant spaceship, stranding it in an unstable orbit. The Qu’uda send one of their own down to Earth to make repairs. The resulting interaction with humans comes at a terrible cost to each.
In the battle between the humans and aliens, Taylor MacPherson captures a Qu’uda alien. From the prisoner, the humans gain the Qu’uda fusion technology and learn the aliens intend to return and bomb them into a stone-age condition. Taylor knows the alien technology is key to ease their primitive condition and provide a means to survive the coming conflict.