Xero knows what she wants: absolute rule over Southern Arizona, a cure for the superbug that’s killing her best friend, and a decent bar of soap. Some are easier to get than others. At least, that’s what she thought. To save her friend, she needs antibiotics. Not just any antibiotics: Ketacillin. The dreaded Zaps are dissolving Trina’s lungs, and only the rare medication can save her. No problem: Xero is an expert smuggler. You want it, she ships it. As the ruler of the Tucson Exiles, she works as a double agent, hustling supplies for the government and pumping the desert full of designer drugs on the sly.