The end is near.
Kit and the others continue to struggle as they work to survive in their search for Polly. They are so close to finding out if she's alive or if like many others she'd succumbed to the virus.
Before they can get back on the road after a brief rest following the loss of one of their own, they run into a stranger who could be the key in finding Polly. Or will he be another thing the group needs to fear?