On his third Everest expedition in June 1924, George Mallory and his climbing partner Andrew Irvine disappeared on the North-Eastern ridge during their ascent - having been sighted only a few hundred metres from the summit. In 1993, in a small Nepalese shop, Makoto Fukamachi, photographer for a Japanese expedition to conquer Mount Everest, stumbles across an old camera. Could it be Mallory's? And does it hold the secret of whether Mallory and Irvine made it to the summit almost 30 years before Hillary?