After escaping execution, Hannah finds herself where she’s always wanted to be…outside the valley of slaves. But the relief doesn’t last, not when the rest of her people are still suffering.

It’s time to return.

With the promise of help coming and the strength of new comrades, Hannah and Cash cross the mountains to rejoin the revolution. But winter has come, and the situation has only grown darker. The Outcasts are dying. The rebels are losing ground. With limited time, the rebel soldiers must hurry to try to convince more Watchers to renounce the Council’s authority before the South arrives to take back their people.