When life hands Jack Heart lemons, he uses them for target practice. Recently laid off, Jack uses his free time to pursue a lifelong dream: hiking the Appalachian Trail. In winter. After fighting off a sickly black bear in the middle of the night, Jack decides to take time off the trail. However, he finds his problems are much larger than a rogue bear. Stuck in quarantined Marshall, North Carolina, Jack Heart takes on the zombie apocalypse, evades renegade locals, and manages to drum up a love interest in the meantime. The daughter of an infected mountain man, Audrey is Jack's ideal compatriot in the war against the undead.