In a remote corner of the Himalaya, in the province of Mustang, mysterious caves, perched high on cliff faces and carved by humans thousands of years ago, have lain just beyond reach - until recently. In April of 2007, a team of climbers and scientists climbed inside the long-hidden chambers for the first time in modern history. Within many of them were found beautiful Buddhist wall paintings and sacrificial artifacts. Most exciting of all, in the last cave that they explored, they found dozens of parchments, as yet to be translated at the time of filming.