The most legendary 'sequence' ever achieved by a mountaineer: on 12 and 13 March 1987, in 40 hours, 26-year-old Christophe Profit managed to climb three of the highest north faces in the Alps, in winter: Grandes Jorasses, Eiger, and Matterhorn. But over and above this 'coverage' of the feat, we discover the wings, the story behind the project, the peaks and troughs of the preparations for it, and the personality of the man behind the climbs, a dancer on sheer rock faces, focusing all the energy and reflexes of life itself in his fingertips.

• Documentary