Basically the anti-Kill List, instead of slowly building to an incredible conclusion this one starts off with the intensity at ten and then peaks way too soon, leading to a disappointing final act. That doesn't take away from the power of the first hour though. The premise is horror simplicity; a group of friends go up to the mountains to do some climbing and stumble across something they weren't supposed to.
The first hour leads them down this dangerous road of bullets and blood that honestly had me straining to catch my breathe. A lot of, "Holy crap!" moments almost from the start and the insanity just builds as more characters are introduced and the intensity is matched by the pure mystery of just what in the hell is going on in these mountains.
Of course like most cases of such a promising start, as we get more answers to who these people are and what their motivation is things become significantly more mundane and lead to a final act that just equates to waiting for what you know is going to happen to happen. It's really disappointing because that middle act has got to be some of the most intense stuff I've seen all year and I'd say it's worth watching for that alone, even if it doesn't pay off on it's promise.