From the introduction:
Recently, villagers in and around the ruins of Old Portsmouth have begun disappearing. It has gotten so bad that the harvest is threatened. Rumours abound of faceless white purebloods coming from upriver in ancient tech watercraft. Heading north to investigate, either along the riverbanks or through the forest, the party comes upon an ancient mine complex. The central computer that used to run the complex before the troubles laid waste to civilization, has awakened. Following its mandate to mine and refine uranium ore, the MineCo 3000 “recruits” labour by sending out its android servants to kidnap any able-bodied beings they can find. Using amplified mind control powers, the MineCo 3000 turns the kidnapped villagers into zombies, keeping them penned up, feeding them on manufactured soy protein and working them until they die.