Bill Paxton gives his injured climber guide (Krycek from the X-Files) the bends, so they can preserve some of this "dex" stuff, to keep their lungs ticking over in the cold.
The crazy hermit Montgomery Wick divides the rescue group into 3 teams of pairs. The first team trip, drop their bomb over a ridge - but survive until an avalanche knocks one of the brothers out into nothingness. The second team race to keep the explosives cold in the low sun ... but it leaks and obliterates them while having a laugh behind a rock.
The 'love interest' has survived still, and she finds the perfectly-preserved body of Wick's wife. It seems the crazy man has an ulterior motive to kill the billionaire, as his wife led the first expedition but the bad guy hid the "dex" for himself and she died.
Using Krycek's blood as a flare, the rescue team find the survivors - and Wick decides to save his enemy's life. Then suddenly the ropes go crazy, and to save the others Wick cuts the line like in the first scene. Peter is a climber's worst nightmare.
They make it down to the base - Annie in intensive care, but Peter gets a kiss from the love-interest other climber. Everyone seems happy enough, even though it was a major disaster and it took another 4 dead climbers to rescue just 1 person. Well, at least they didn't try that on the highest mountain in the world, best to start small.