Ana Hardy defines herself by the drive and dedication that have made her the perfect US marshal. It's the only way she can define herself-abandoned as a girl, with no family and no childhood memories to speak of-her past is a mystery even to herself. After years on the trail of Chicago's biggest crime bosses, Hardy and her partner Marshal John Cotton have just made the bust of their careers. At least it should be. In a daring and dangerous raid, they've brought down a network of criminals guilty of everything from human trafficking and extortion to dealing drugs. But when the marshals get a high-ranking mafia soldier to become an informant, a questionable government organization sweeps in and turns their worlds upside-down. Hardy's ushered into a vast, secret underground, with only her former quarry and informant to turn to. There, she learns the powerful truth about her nation and herself as she's asked to do more than she ever thought possible. But back in Chicago, Cotton's determined to find what's become of his partner, even at the cost of his job. He's forced to turn to desperate measures and to find solace in a dangerous and surprising ally of his own. What Hardy and Cotton discover in their twisting and thrilling adventures tests everything they thought they knew about loyalty, trust, and the power of secrets.