Netflix's "The Watcher" is based on a true story. Here's the history of the house and its stalker

"The Watcher," a new horror show about a house being stalked by an anonymous tormenter, has hit Netflix – but it's not just a scary story, it's a real one. A house in Westfield, New Jersey has been notoriously stalked by someone who sends harassing letters – signed by "The Watcher" – to its inhabitants.

After buying the house at 657 Boulevard in 2014, Derek and Maria Broaddus decided to renovate it before moving in. As they re-did the house, "The Watcher" began tormenting them, claiming in his anonymous letters that the house was his family's for decades and that he was put in charge of watching over it, waiting for its "second coming."

The couple did a 2018 interview with New York Magazine, in which several of the threatening letters were printed. "657 Boulevard is anxious for you to move in. It has been years and years since the young blood ruled the hallways of the house," one eerie letter read. "Have you found all of the secrets it holds yet? Will the young blood play in the basement? Or are they too afraid to go down there alone."