The movie tries to be creepy in a Gaslight kind of way as the main guy, after his long missing sister returns, begins to suspect it might not actually be her and nobody believes him. Potentially an intriguing premise but the problem is, the unfolding mystery is really dumb and boring and the actions of the protagonists make no sense and are not believable at all. Also, none of the characters are interesting or sympathetic, I just wanted them all to die. Basically it's an American horror knock-off, with lots of elements borrowed from a variety of equally worthless Hollywood garbage.
Don't waste your time.
Don't waste your time.