Severely wounded after being caught in an explosion, Lucas Page left the FBI behind and put his focus on rebuilding the rest of his life. But he is uniquely gifted in being able to recognize patterns that elude others, a skill that brings the FBI knocking at his door again and again. Page's wife, Erin, loses a friend --- a gifted plastic surgeon --- to suicide, and Page begins to realize how many people Erin knew who have died in the past year, in freak accidents and now suicide. Intrigued despite himself, he begins digging through obituaries and realizes that there's a pattern --- a bad one. These deaths don't make sense unless the doctors are being murdered, the target of a particularly clever killer.

On a beautiful October evening, New York City's iconic Guggenheim Museum is closed for a tech company's private gala. Until an explosion rocks the night, instantly killing 702 people, including every single attendee --- yet the damage to the building itself was minimal. An explosion of that precision was no accident. In response, the FBI mobilizes its entire team, but the sheer number of victims strains their resources. Dr. Lucas Page is uniquely gifted for the task at hand --- he can visualize a crime scene as if he was a bystander and can break down any set of data at a glance. Even though Page wants nothing to do with the FBI, with his city under attack and his family at risk, he steps in to find a killer in a haystack before they strike again.

During the worst blizzard in memory, an FBI agent in a moving SUV in New York City is killed by a nearly impossible sniper shot. Unable to pinpoint where the shot came from, the agent-in-charge, Brett Kehoe, turns to the one man who might be able to help them --- former FBI agent Lucas Page. A university professor and bestselling author, Page left the FBI years ago after a tragic event robbed him of a leg, an arm, an eye and the willingness to continue. With a new wife and family, Page has no interest in helping the FBI --- except for the fact that the victim was his former partner. Agreeing to help for his partner’s sake, Page finds himself hunting a killer with an unknown agenda and amazing sniper skills in the worst of conditions.