A DEA agent uncovers an international conspiracy when she follows a tip from a Mexican drug lord in this "intelligent, propulsive thriller" (Publishers Weekly, starred review). Diane "Hardball" Harbaugh doesn't flinch easily. A former prosecutor, she's now a DEA agent known for getting suspects to confess-in tears. But she's thrown for a loop when a Mexican drug lord offers her explosive information about the international black market. After heading south of the border to meet him, her concepts of justice and duty are shaken to their core. Suddenly, Harbaugh is on the trail of a criminal conspiracy more pervasive than anything she ever suspected. Together with CIA agent Ian Carver, she unravels layers of deception and grift that date back to the Afghanistan War. As they connect the dots, they become the target of cartel assassins, embittered spies, and even their own government. Now the only way out is for Diane to do the one thing she promised herself she'd never do...