The antagonists of the movie are brother and a sister, both with black hair, that are members of a misterious cult. They inflitrate a group of teenagers, the brother dates a girl, which is the protagonist of the movie. The group of teenagers go to a trip to a place that I can’t remember well, it is isolated and has forest around it. By the end of the movie, the antagonist sister is torturing one boy, and she puts acid eye drops in his eye, and he became blind. I remember that he survives by the end of the movie. Other detail that I remember is that the misterious cult, once kills one of the teenagers, they became a part of the cult resurrected. The cult uses a black garment.

I saw the movie circa 2005-2007, in DVD, in a friend’s house, which also has bought the movie “The Skeleton Key” together with it. I think it was a English Movie, but I saw it dubbed in Portuguese.