A harrowing real-life mountain climbing incident is at the center of this British semidocumentary film. In 1985 Joe Simpson and Simon Yates scaled a 21,000-foot peak in the Peruvian Andes. But Simpson broke his leg, and their battle for survival turned out to be an extreme ordeal. The movie shows actors and their climbing doubles recreating the incident, and there are interviews with the real Simpson and Yates years afterward.