The Gray Death fungal spore took over the globe in 2018 - wiping out most of the population and reanimating their corpses. Major cities were firebombed in an attempt to contain the spread. The military did everything it could to usher the remaining civilians north into Canada or west ever the Rocky Mountains. Those left behind are forced to fend for themselves - deep in the heart over-run cities, deadly wilds, and quarantined towns.
Haven, Colorado is one such place. Secluded from the rest of the world, it still faces imminent danger. Just west of Denver, high in the mountains, a city called "Haven", survivors see swarms of zombies, are attacked by brutal scavengers, and have to face the bitter climates of their location with limited access to basic survival gear. But they have a military presence, the luxury of relative safety, and locals that know how to cut a life out of the wilds.
With a cure in their midst, Haven doctors work with a WHO member on something that could viably save the world. Though it only stops the spread of the Gray Death within a victim after exposure, after a certain point there is still no hope. They still believe that something more prolonging and restorative can be found. In the meantime, they have become the center of attacks by rogues wanting the cure for themselves - without any regard for the innocent lives they may take to retrieve it.
To help the people of Haven survive, the remaining military that has taken up residence within the town has banded together with the locals - rangers, clergy, and even a biker gang - to help protect the surrounding areas, as well as head into Denver on runs to retrieve necessary items, and look for other survivors. With all the dangers that they face, it's a wonder anyone still lives in this ...
Time of Dying.