• Genre: travel, discovery, nature, science

• Running time: 60'

• FORMAT: documentary (HD)

• English  

This is the unique and dangerous scientific speleological expedition down the DEEPEST VERTICAL CAVE in the world. Austrian, Abkhazian, German, Italian and Russian speleologists travel in a vertical caves where films are almost never shot due to the insane complexity.

Each time cavers face unpredictable dangers and obstacles – low temperatures, deadly descents, surprising underground waterfalls – and fight with their emotions, when it seems there is no way ahead.