The film has a father taking his son away from the city for the summer as punishment for cracking the parental locks on his computer. Off in Vermont father and son begin rebuilding a house with the intention of flipping it. However as the house is rebuilt the previous owner, the title entity, seems to be getting stronger.
Small low key film kind of plays more as a family drama with a supernatural edge than a straight on horror film. Yea, the film has some scares, but the film is more interested in the relationships than scares. More keenly the third act reveals the film to be something unexpected. (or not since I felt echoes of a film/book I can't mention lest it influence your take on the film.)
While I don't think the film is bad, it just didn't blow my skirt up.
Worth a look when the film hit Shudder, I'm not so certain you need to run out and see it before that.