Ryan, an adventurer, and his dog Shailo find themselves caught in a zombie apocalypse. They travel through various terrains, fighting off zombies, before finally discovering a settlement. The community, led by a paranoid man named Jack, turns on itself, and Ryan and Shailo escape with the help of soldiers. They arrive at a fortified city, where they help to build a community, but a new threat emerges when the zombies mutate. They discover a cure in a laboratory and manage to create more doses to save people from the virus.