The first ascent of the Matterhorn was made on July 14, 1865 by Edward Whymper, Francis Douglas, Charles Hudson, Douglas Hadow, Michel Croz and two guides from Zermatt, Peter Taugwalder father and son. Douglas, Hudson, Hadow and Croz are killed on the descent after Hadow slips and drags the other three men down the north face. Whymper and the two Taugwalders, who survive, are later accused of having cut the rope that connected them to the rest of the group so as not to be dragged into the fall, but the ensuing investigation finds no evidence of their guilt and they are acquitted. The Matterhorn is the last great peak in the Alps to be conquered and its ascent marks the end of the golden age of mountaineering. One hundred and fifty years later, a team undertakes the same expedition in order to unravel the mystery.

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