It is a rare thing when the best thing about a horror film is not its setting, hook or frequency of scares, but rather its lead performance. It may falter in other areas, but in this respect, Silent House is a refreshing anomaly. Yet be calm, horror diehards, because those earmarks I mentioned are potent as well. The one-take shooting style delivers constant tension, the “haunted” house serves as an ominous entity and there are plenty of thrills to be had in way of white-knuckle fright. In fact, if not for its final act, Silent House could have been something special. In spite of that blunder, however, there is plenty to appreciate in Elizabeth Olsen.