Barrens is set in a post-apocalyptic setting where the world's population has dwindled due to virus and warfare. The remaining cities are well protected, inhabited by the wealthy, and spread out across the country. When these wealthy need to be transported from one city to another, they hire an escort for protection. When they need something taken care of without question, they hire The Barrens. And when the barrens are involved, Esme Ford is the only one you can trust.