Tin Road is the second book in the Metal Heart series that follows the exploits of young women and men conscripted into and "national service. and "This installment focuses on Scarlett Buford and Rabbit Santiago as they escape from the Fort Columbia base and travel to Mexico City, carrying with them a cure for the nanovirus.At the same time, a mysterious clone awakes on the East Coast and joins forces with a super artificial intelligence with the same goal of eliminating the nanovirus.But do all of their purposes truly align?