I thoroughly enjoyed this movie. Personally, the plot twists kept me on the edge of my seat and I was totally blindsided by the outcome. I will admit that I'm kind of assuming that the secret behind the cellar door is symbolic and/or meant to be left to the audience for interpretation. Honestly, I feel like the movie could have been written with the whole cellar door thing omitted, and easily been just as satisfying to the viewer. Either way, it's just a good movie.