Robie had killed evil before. People were happy, thrilled that another monster had met his end. But the world went on, as screwed up as ever, and another monster - maybe even worse - would replace the fallen one.On that clear, crisp morning in the normally serene Central Park his trigger pull would be remembered for a while. Investigations would be made. Diplomatic broadsides exchanged. More people would die in retaliation. And then life would go on. He was one of the best they had. And she came too close for comfort.When government hit man Will Robie is given his next target he knows he's about to embark on his toughest mission yet. He is tasked with killing one of their own, following evidence to suggest that fellow assassin Jessica Reel has been turned. She's leaving a trail of death in her wake including her handler. The trap is set. To send a killer to catch a killer. But what happens when you can't trust those who have access to the nation's most secret intelligence?