Three years after emerging from cryosleep, the survivors of the apocalypse don't always agree on the best way to live together. Joanna and Levi travel between the bunker communities, fostering cooperation and trying to prevent conflicts. It's harder than it looks. Just when Joanna thinks they're making progress, she learns a cohort is missing. The bunker's nearest neighbors claim the inhabitants never woke up from cryosleep, but they...