film about the adventures of Álvar Núñez Cabeza de Vaca (c. 1490 – c. 1557), an early Spanish explorer, as he traversed what later became the American Southeast. He was one of four survivors of the Narvaez expedition and shipwreck. He became known as a shaman among the Native American tribes he encountered, which helped him survive. His journey of a number of years began in 1528. After his return to Spain, he published his journal in 1542. The screenplay by Guillermo Sheridan and Nicolás Echevarría is based on this journal.