"Society of the Snow"'s narrative is framed by the voice of Numa Turcatti, who, in a significant twist, is revealed to be one of the last to die before the final rescue. His narration from beyond the grave elevates the story from a simple survival tale to a poignant remembrance of all 45 people on the plane. The survivors' ultimate decision to resort to cannibalism is a central, harrowing plot point. The film depicts this not as a descent into savagery, but as a systematic and spiritual pact made out of desperate necessity. They agree that should they perish, their bodies should be used to sustain the others.
Another critical event is the avalanche that buries the fuselage, killing eight more survivors, including the group's initial leader, Marcelo Pérez. This second catastrophe deepens their despair but also strengthens their resolve. The climax of the film is the incredible 10-day trek undertaken by Nando Parrado and Roberto Canessa. After climbing a massive peak and realizing they are much farther from civilization than they thought, Nando's refusal to give up is the ultimate turning point that leads to their encounter with a Chilean arriero and the subsequent rescue of the remaining 14 survivors. The ending does not shy away from the survivors' trauma and guilt, emphasizing that their return to the world is not a simple happy ending but the beginning of a lifelong process of carrying the weight of their experience.