Santiago betrays his countrymen when he frees Renco Capac , an Incan prince , from a prison hulk .
It is told in the form of a story within a story , the memoirs of a Spanish priest during the discovery of South America .
Santiago betrays priest 's countrymen when he frees Renco Capac , an Incan prince , from a prison hulk .
It is told in the form of a story within a story , the memoirs of a Spanish priest during the discovery of South America .