The story about a first descent of one of the biggest canyon in the world. The Chamje Khola canyon is located right in the heart of Nepalese Himalaya, between the Annapurnas (8091m) and Manaslu (8163m) mountains. The Himalayan canyon team, a French association, descended more than 30 canyons since 2004, but they had to wait until 2011 to be ready to face the monster who is ``Chamjé Khola``. It`s final exploration required 5 days of effort with a delicate and snowy access at a high altitude followed by 7km of canyon and a 2300m descent. Possibly the longest and most committed canyon ever done.