In the 1990s, a high Himalayan cave in Upper Mustang, Nepal was discovered to contain 42 ancient people, buried on wooden bunk beds. American archaeologist Dr. Mark Aldenderfer believes there must be more burial caves, but the challenge is how to find them deep within cliff faces in the cold and inhospitable environment of the Himalaya.
He enlists the world's best technical climbers to do the searching. Aldenderfer's theory is the funerary caves were carved out by the earliest people to have settled in the Himalaya. If he can find their remains and extract their DNA, he'll learn who these people were and what brought them to the toughest parts of the planet to live.