Various shots of mountain climbers in action showing several CUs of nailed boots clinging to precarious foot holds, ice axes chipping hole in rock face, pitons being inserted and ropes being fastened to pitons. LSs and MSs sequence on party crossing glacier, of man crawling over dangerous spot. Shot of man falling into crevasse. HAMS of man in shallow crevasse, climbing out. Shots of climbers using climbing ropes to negotiate particularly difficult passages, climbing to top of pinnacle.