When a long-distance serial killer begins targeting victims in New York City, NYPSD Lieutenant Eve Dallas believes that the killer must have a reason for targeting her city. If she can figure that out, and why the sniper is selecting his victims, she knows she can ultimately find him. Eve gets her first big break in the case when her husband, billionaire businessman Roarke, creates a computer model that helps narrow down the spot from which the sniper first began his murderous spree. Once Eve finds the killer’s nest, however, she is in for a surprise, since it seems there isn’t just one shooter but two: a master sniper and an apprentice being trained in the cold-blooded business of murder.