As part of the conquest of Mexico by the Spaniards, Rodrigo, a Spanish shipwreck falls in love with Tizcuitl, the young and beautiful Aztec daughter of Nezuhual, king of Tlacopan, powerful under the emperor Moctezuma.
Two corrupt policemen, who abuse their power by extorting money and killing those who get in their way, take charge of the investigation into the murder of a very rich man, the main suspect being his wife.
