Cathy Lindsay-- a middle-aged, middle-class, small town resident, high school English teacher, and married mother of two-- is an unlikely candidate for a murderous ambush. As Sergeant John Winters begins his investigation, he finds himself frustrated at every turn. Why would anyone want to kill Cathy? She was a respected teacher in an apparently solid marriage and living a quiet life. Winters, with the help of young Constable Molly Smith, digs deep into the Lindsays' marriage and friendships, searching for a suspect and motive, but one thought continually arises in his mind: Is it possible this was a random killing or a case of mistaken identity?