Sixteen-year-old Riley Meemick is one of the world’s last free girls. When Riley was born, her mother escaped the Breeders, the group of doctors using cruel experiments to bolster the dwindling human race. Her parents do everything possible to keep her from their clutches– moving from one desolate farm after another to escape the Breeders’ long reach. The Breeders control everything–the local war lords, the remaining factories, the fuel. They have unchecked power in this lawless society. And they’re hunting Riley.