In the 16th century, Santiago, a Dominican friar, is the only survivor of an expedition that set out in search of the mythical South Seas under the direction of the cruel Gazcuña. Thanks to his Christian faith and his missionary ardor, he was integrated among the Caribbean Indians, until, after an incident with the chief of the tribe, he was forced to flee with his wife and son. He is arrested by the Spanish soldiers and accused of being a heretic, which means Inquisition and torture. But the real secret that the mercenaries want to extract from him is the place where Gazcuña has hidden 30,000 pesos in gold.
