In need of an old car part to power Goodman's broken electricity generator, Ash and Greg travel to the Cartmel scrap market, where goods are now bought by civilians in exchange for euros or bartering items of value with each other. The boys find the part available for sale, however its owner demands an unviable return. They instead decide to try their luck at Devil's Island, a mound of land largely consisting of a giant scrapyard with a dangerous reputation. While looking around the deserted site, they discover that it is inhabited by numerous feral, mutant dog-like children of varying morality, living as a pack among the vast waste.