The first rule of the Arclight is Light is safety; light is life. Within the walls of light, people are protected from the Fade—the creatures that have destroyed the world. The second rule is Never go outside alone. The third: No one ever comes back from the dark.

But Marina did. She doesn't know who she is or where she came from. And she doesn't know how she survived the Fade.

Or why they want her back. But they do want her back, and their attacks on the Arclight won't stop until they have her.

What secrets are locked inside Marina's memories? Where does she belong?