I thought there might be a chance this movie would be amusing, if not slightly reasonable given the cast.
I was wrong.
There might be some spoilers here, and for this movie I use the word lightly, but be warned.
The basic plot:
1) Crack team of commando type soldiers get assigned a special mission. Cuba us their leader.
2) An anthropologist, who works for the CIA, is the special 1-time leader. Their mission is to extract her father, who is another scientist type.
3) The go into a bunker, which used to be a tomb (1,000 feet deep). In the process, we learn that "sand can blast your skin off, so stay tight". Because if you are close to one another, obviously sand *can't* blast your skin off... for some reason.
4) The SAS type folks then find a person full of disease like boils. Of course, they treat the person and don't think that this is odd. The person is a priest, still alive, who they don't bother really containing.
5) Most of the SAS types go down a very fast moving elevator. 1 stays up. We learn that you can watch porn anywhere, as the 1 at the top level is keen to view porn. Later (by the way) he see's a hot lady on the level (which they previously cleared). So, we learn that SAS folks expect to find hot, naked ladies on levels of underground bunkers - which were previously found to have no hot naked ladies - and this is normal. Of course she eats him.
6) Back to our fearless heroes below. We learn that if you are SAS, and you see your unborn baby girl suddenly be a little girl while wondering the tombs underground corridors, you should follow her. It's a great idea. Then we learn that if she turns into a demon, that's reasonable (and she's still...cute?) I suppose SAS deal with that daily. Then, if you hear her again, you should follow her again. Even after she tried to bite you last time. Then, as you *are* in a danger zone and on a mission, whilst hearing your demon baby calling down the halls, our fearless mother to be decides it's a good time to suck on another woman's disease boils while satisfying her lesbian curiosity. Okay.
7) The rest of the troop go wandering around, looking for the lead scientist. Whilst doing the wandering, we learn a few more things:
a) That any other hallucination is something good, and should be followed, listened to, or otherwise obeyed.
b) That demon's don't know how to use elevators. But they can discourse on philosophy, open doors, use radios, equipment, and basically anything else. Except elevators.
8) The above relates to some plot line where the demons (I think) want to get out of the tomb. But they can't. Even though it turns out there are *two* entrances/exits, and for 1 of them you *didn't* need to use the elevator. It's a mystery why they can't get out. Maybe I missed something about them being impaired with elevator button pushing.
9) So they have the showdown with the major demon thing. Then, Cuba's character, who doesn't seem at all religious, get's inspired by another character. When he touches her amulet, he instantly becomes infused with passion and deep spiritual belief he's never had before, and suddenly becomes obsessed with a new calling in life. Cuba is now the religious demon hunter.
One could go on and on with the silly plot holes. If any of this sounds ridiculous to you, that's because it is. Really.
Watch this movie if you get it free, don't value your time (or are really sick, and laying on the couch in a fever), or really want to laugh at how bad a movie can be.