The Icons came from the sky. They belong to an inhuman enemy. They ended our civilization, and they can kill us.
Most of us.
Dol, Ro, Tima, and Lucas are the four Icon Children, the only humans immune to the Icon's power to stop a human heart. Now that Los Angeles has been saved, things are more complicated - and not just because Dol has to choose between Lucas and Ro, the two great loves of her life. As she flees to a resistance outpost...