蒙古Amazon rainforest, 1538. King Carlos V de España y I de Alemania sends a group of Spanish soldiers to the new continent to locate Teziutlan, a legendary city created with gold, to claim it to the Spanish Empire. Alone in the rainforest and without a help, soldiers face not only indigenous tribes but the manifest hate themselves by their respective birth places. Leaded by old Don Gonzalo, married with young Doña Ana, his aging and weak health turns in danger Ana, who is disputed by Alférez Gorriamendi, Gonzalo's right-hand, and soldier Martín Dávila. After to realize that Viceroy of Port Prince has send another expedition looking for them leaded by Juan Medrano after to accuse Don Gonzalo of treason, Dávila, Gorriamendi and other soldiers as Sargento Bastaurrés and Barbate must decide if fight against Medrano's and his men or continue until Teziutlan. But the rivalry and hate between them will reveal more dangerous than the own rainforest and the indigenous tribes