This movie sometimes is really scary. All the usual aspects are there: a big house with a lot of rooms, a creepy landlady and some other strange people walking around.
The main character (Jeffrey) is a decent young man with a job as architect. His is in love with a unpredictable guy (Rene). To be close with the guy Jeffrey rents a apartment in the same building without letting him know that. The previous tenant left suddenly, leaving his belongings in the apartment. Then things become interesting. The landlady has a handyman available who can't speak and is deaf. And since Rene isn't interested in Jeffrey anymore he has time to work at the building finding some strange things.
Since this is a thriller a lot of things happen where anybody with a clear view would say: keep out and get away. But that won't make a long and interesting movie.
Overall the acting in the movie is good. The story is a little bit thin, but not annoying. Don't think too much and just enjoy.