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 Mother whom he joins in their struggle against Nimir.Nicholas Graydon ran into Starrett in Quito. Rather, Starrett sought him out there. Graydon had often heard of the big West Coast adventurer, but their trails had never crossed. It was with lively curiosity that he opened his door to his visitor.Starrett came to the point at once. Graydon had heard the legend of the treasure train bringing to Pizarro the ransom of the Inca Atahualpa? And that its leaders, learning of the murder of their monarch by the butcher-boy Conquistador, had turned aside and hidden the treasure somewhere in the Andean wilderness?Graydon had heard it, hundreds of times; had even considered hunting for it. He said so. Starrett nodded."I know where it is," he said.Graydon laughed.