An alien race invades the warring and diseased remains of Earth. They exterminate all human adults. They recruit orphans for military training in their underground, experimental training facility. Rustle is a young scout in a tight-knit female warrior group of five. They're trained to be aggressive, quick thinking, obedient-though for what exact purpose they couldn't quite tell you. But somehow the group is falling apart now. The leader Shona turns out to be a traitor to them. Roku has disappeared. Rustle has failed to show her killing skills in a crucial test of courage, and is feeling quite separate from the others. Loo is a true warrior, ready and able for action of the most extreme kind, though Rustle's private yen for her has not dimmed. Solomon, the healer of the group, is a steady hand, but not even her stability can save them. So when their StarPod is transported to the Living Lab, they all know that it's time to make a run for it, or else they'll be deplugged - finished, dead. It takes a lot of wit and energy, but eventually they make it to the outside of the great mountain where they've been raised and trained and programmed-and here for the first time they behold the big, big sky of the real world.