It's been three months since Amy escaped New Hope, and she's been surviving on her own, like she did in the After. But one day, a voice rings out in her earpiece. In a desperate tone, Kay, the Guardian she worked with, utters the four words Amy had hoped she would never hear: Dr. Reynolds has Baby.

Now it's a race against time. In order to save Baby, Amy will have to make her way to Fort Black, a former prison turned survivor colony. There she will need to find Ken, Kay's brother—for he holds the key to Baby's survival.

But before she can do any of this, she'll have to endure the darkest places—and people—of the prison. And one small slipup could threaten the survival of everyone.