A careful, methodical young data analyst for a California insurance company, john walker knows when people will marry, at what age they will most likely have children, and when they will die. All signs point to a long su...A careful, methodical young data analyst for a California insurance company, john walker knows when people will marry, at what age they will most likely have children, and when they will die. All signs point to a long successful career--until max stillman, a gruff security consultant, appears without warning at the office.