Shadows of Savenville (2005)

A man with a haunted past returns to his small midwestern town to check on his brother who has had a bit of a mental break. Upon arriving in the town of Savenville, he finds his brother holed up, sitting in front of a boarded up section of his house, swearing that there is something horrible on the other side. And he's the only thing keeping it from getting out.

Unfortunately the movie Shadows of Savenville is not yet available on HBO Max.