The final push to the summit begins. The two summit teams have been selected, and all that stands between them and success is five of the most grueling days of their lives.
But heavy snow begins to fall again slowing their progress and when they finally reach the final obstacle, the steep and avalanche prone Hornbeim Couloir, disaster strikes.
Heavy snowfall has filled the Couloir with wind slab, which is extremely likely to cause avalanches. How can the team progress?
