While searching for lost Inca treasure in South America, American mining engineer Nicholas Graydon encounters Suarra, handmaiden to the Snake Mother of Yu-Atlanchi. She leads Graydon to an abyss where Nimir, the Lord of Evil is imprisoned in a face of gold. While Graydon's companions are transformed by the face into globules of gold on account of their greed, he is saved by Suarra and the Snake Mo...