Altitude connects them. From the glaciers of the Andes to the peaks of the Himalayas, via the Alps and the plateaus of the High Atlas, the mountains have transformed their destinies. They are activists, shepherds, guides and scientists. They are reverent, curious, passionate or solitary. They want to change their lives or the world. Or simply live by sharing their idea of happiness. All of them are ordinary people with no thought of conquest or sporting feats. Finding themselves up high almost by chance, it is their convictions, not their ambitions, that have called them to the mountains. Their true stories bear witness to singular ascents, but above all to a long journey towards their intimate quests, and ask a universal question: ‘What is our mountain?”