The shots came quickly, silently, and with deadly accuracy. Within seconds, three people lay dead at Central Park's ice skating rink. There's a sniper loose on the streets of New York City, and Lieutenant Eve Dallas is about to face one of the toughest and most unsettling cases of her career.

Eve knows that only a handful of people could have carried out such an audacious but professional hit. Even more disturbing: this expert in death has an accomplice. Someone is being trained in the science of killing - and they have a terrifying agenda of their own. With a city shaken to its core, Eve and her team are forced to hunt not one but two killers. Worse still - this talented young apprentice has developed an insatiable taste for murder...