Une goutte d'eau sur un volcan

Frédéric Swierczynski is one of the world'sleading cave divers; Sébastien Devrient a film director and mountain guide. Together they head for the Atacama Desertin Argentina, a unique scuba-diving expedition, alone andwithout back-up. Here the Ojos del Salado volcano is home to the world's highestlakes.