Cure

Humans are twisted creatures - alive, or dead - but what happens when they're dead? Do they just stop? Is there still a small form of life there we're un aware of?
It's currently 2018 and the living dead have been wandering the earth for a month and a half now searching for any sign of humanity to chew on. Literally.
Sarah remains alive, getting by with a small group of people, willing to do anything to stay alive. You don't get to pick and choose your friends in this world. You find a human, you help them. You find a walker, you destroy it. A single bullet, knife, axe, arrow, even screwdriver, could save your life now.
In your own headspace, you're alone. You have nobody except the silent voice in the back of your head saying "kill, kill, kill."
And that's exactly what Sarah and Harry have been doing. Killing walkers - who were once humans - to survive. To live long enough to see if there's a cure.