Wanting of a Ruined City details Cass's first steps into working as a Proxy, a profession used by people who undertake all sorts of odd jobs and contracts that cover a wide range of required backgrounds and expertise to complete. As a Grade 9 Proxy, the lowest Grade, Cass was desperate to pick up any contract he could find and there was a contractor that was just as desperate to recruit willing bodies. With a newfound duty to trek the abandoned metropolis of Corriente, Cass and his five allies will be met with powerful rivals and adversaries who all vie for the same goal: the truth behind Corriente's devastation.