It is eighteen years after Idlewild and the survivors are now adults. Though Halloween, bitter and disillusioned, has chosen to exile himself, his peers seek to repopulate the Earth and rebuild civilization. They are mankind’s last, best and perhaps only hope. But an ideological split has divided them into two very different societies. One looks to resurrect the human race, while the other is committed to improving humanity via genetic manipulation.

And so a new generation of children is born, but as they mature it becomes clear that all is not well. Someone -- or something –- is moving against them, even as the plague that claimed billions of lives makes a deadly return. The survivors must work together, but to save the future Halloween must first let go of the past...