This movie started off as a decent creepy movie with the sister still being alive and the brother trying to cover for her and keep her hidden. It wasn't really good, but decent. Then there was a twist that pretty much dumped this movie right in to the crapper and I felt like I was watching a repeat of that show Criminal Minds. Can't really go in to much more detail without playing the whole Spoiler Alert thing and to be honest - the movie was too crappy to waste my time going in to any more detail.
I would absolutely not recommend anyone bothering with this movie. It is pretty pointless and a big pile of poop. Any hope it might have had left once they did their stupid swerve.