A heavily pregnant Summer Hurst is adapting to life in the caves among the Navigator clan as violence lights up the world outside. A coup within the compound throws plans into chaos as confusion and cries for blood replace long-held traditions of compassion and democracy. In the world outside, power struggles divide the militia as attacks among the civilian population from unknown forces make leadership paranoid. In the background, characters like Nash, the bounty hunter and Jake Hurst, the fugitive, navigate through the chaos.