"Dearest neighbor...allow me to welcome you to the neighborhood." Imagine receiving a letter that starts out with that sentence as you get ready to move your family into your new home. You'd probably be touched at the heartfelt message. But as you read on, the welcoming words turn sinister and you realize your family is in the sights of someone unseen but who knows everything. This is what Derek and Maria Broaddus went though when they bought their dream home at 657 Boulevard in Westfield, New Jersey. It wasn't long after the closing that the letters came from someone who called themselves The Watcher. And this Watcher seemed to know small details about the family, including the Broaddus' three children. The Watcher could be anyone. Were they a stranger lurking in the shadows of the Boulevard? Or were they the smiling neighbor waving from their front porch? Who is The Watcher of New Jersey?