The deepest cave on earth was a prize that had remained unclaimed for centuries, long after every other ultimate discovery had been made. This is the story of the men and women who risked everything to find it, earning their place in history beside the likes of Peary, Amundsen, Hillary, and Armstrong.
In 2004, two great scientist-explorers attempted to find the bottom of the world. Bold, American Bill Stone was committed to the vast Cheve Cave, located in southern Mexico and deadly even by supercave standards. On the other side of the globe, legendary Ukrainian explorer Alexander Klimchouk - Stone's opposite in temperament and style - had targeted Krubera, a freezing nightmare of a supercave in the Republic of Georgia.