They told her to peer into the mind of a killer.

They didn’t say which one....

It happened in a place of privilege in New York City, when a twelve-year-old boy committed an act of violence that stunned the city and the nation. Now forensic psychiatrist Tamsen Bayn has been hired by her fiancé, who is also a lead prosecutor in the case, to interview the accused boy’s parents and unravel the mysterious causes of an inexplicable crime.

But when she does, Tamsen discovers something more shocking than the psychological history of a family and the pain of a deeply troubled boy. Tamsen begins to examine a shadowy connection between this crime and a pattern of violence around the country.

Suddenly Tamsen is caught between science and the law, between the man she loves and a truth she must pursue. Inside an explosive mystery that involves genius, greed, hope, and murder, Tamsen may become the most dangerous player of all: the one who knows too much....