Plagued by the ghosts of her dead sister and brother-in-law, Kristin can't say why she hasn't already joined them. For if the zombies don't take her out, her type 1 Diabetes will. It's a deadly condition if not treated right, and there is no room for that in this new world. Better to just get it over with.

At least, that's what she thinks, until she stumbles over three helpless survivors. Spurred on by a voice that sounds a lot like her sister, Kristin takes them under her wing and try to teach them how to survive in this new, hostile world.