Jack Mcevoy Has Taken Down Killers Before, But When A Woman He Had A One-night Stand With Is Murdered In A Particularly Brutal Way, He Realises He Might Be Facing A Criminal Mind Unlike Any He's Ever Encountered. Jack Investigates Against The Warnings Of The Police And His Own Editor, Walking A Thin Line Between Investigation And Obsession, And Makes A Shocking Discovery, Connecting The Crime To Other Mysterious Deaths Across The Country. But Then He Himself Becomes A Suspect, And As He Races To Clear His Name, Jack's Findings Point To A Serial Killer Who Uses Personal Data Shared By The Victims Themselves To Select And Hunt His Targets.