Sarah (Elizabeth Olsen) is staying at a lakeside house with her father and uncle Peter. They are fixing the house up to sell it. While she is inside, Sarah starts hearing strange noises. The windows are all boarded up, so even though it's the middle of the day, the house is dark.
At some point, her uncle will leave and her dad will disappear, so she will be in the house alone. A lot of time is spent following her as she looks around calling out "Dad?" or "Uncle Peter?" Every now and then, something goes boom real loud, or we see a figure standing in the background.
At first we aren't sure - is this a ghost story, or some kind of home invasion story? There is a point where we think maybe someone has been living in the house while it was abandoned. The movie is one continuous take - at least it looks like it was. That's about the only thing the movie has going for it. It isn't enough for a movie to make us jump every 5 minutes or so. There really isn't much of a story here. I found I was bored 15 minutes in, and I couldn't wait for the movie to end.
When we finally find out what's been going on, there are still unanswered questions. And I don't care enough about the movie to invest any time or effort into trying to figure it out. Just skip this one.