The survivors of the Nixon Center escape struggle in a post-apocalyptic world where the walking dead aren't the biggest threats. Working from a remote, mountain cabin, Dr. Howard Nixon is determined to salvage what is left of his experiment.Allison escapes him, clinging to life and with no idea what's happened in the world. Zach is looking for her, but time is running out.Reid lives holed up in the Nixon Center, waiting to get his revenge.Tension is high as both Miranda and Carlene's pregnancies come to term. Miranda, faced with the possibility that her delivery might cause her to become infected, is forced to seek help from the only other person who knows what has happened: Dr. Michael Waters, the physician who set her up in the first place.All roads lead back to Strandville where grudges resurface and old decisions must be answered for. Scott, Miranda, and Michael return to the center to face-off against their pasts and each other when Michael's secret agenda comes to light.