Open Grave starts off simple, but as the film goes on, it becomes more and more sinuous. The plot goes in directions you wouldn't expect, and the pacing is just right. This is the type of movie that will constantly keep you guessing and does an incredible job of building suspense. The story slowly pieces itself together as it goes along. My eyes were glued to the screen the entire run time. I think what I liked most about the film was the sense of mystery. You know nothing about the outside world, and you will constantly wonder who the characters are and why they are in that situation. I cannot rave enough about the suspense. While viewing, I found myself wondering what I would do if I were in that situation. It is also VERY well shot and well directed. The camera angles, lighting, sound effects, and music could not have been done better. As you can tell, it is extremely difficult to review this film without giving away any key plot points, but for fans of the mystery genre, it is definitely worth checking out. My only flaws with the film are minuscule; some of the dialogue, not all, but some, feels slightly forced. Also the ending was very disappointing. However, those two things do not take away from the overall conclusion that Open Grave is a fantastic movie that is a must-see for fans of the genre.