John Eric Carver and Shrek are a retired Navy SEAL war dog team, now living in the mountains outside of San Diego. Both man and dog thought their life was now settled, finding peace on the forty-acre ranch they had moved to. But life, and a mutated virus, changed all that. Now, they have to survive a worldwide pandemic. Taking refuge in a nearby Boy Scout camp, Carver leads a group of teens and their parents as they are forced to deal with infected creatures that are rapidly consuming the world.