The Chronicle recounts that the Ugha Mongulala were visited by light-skinned gods who came from the sky in golden vehicles around 1300 B.C.E. The visitors came from a world called Schwerta, and they come once every 6,000 years to share their knowledge. Thirteen underground cities are said to have survived to this day-four of which are still inhabited by Indians. The Ugha Mongulala claim that the remaining cities contain technological equipment of the god-astronauts. In one of the underground cities it is claimed that there are three men and one female mummy with six fingers and six toes.

The Chronicle of Akakor was purportedly authored by Tutunca Nara and edited by Karl Brugger. It is sometimes cited as evidence for the ancient astronaut hypothesis. Translated from German and published in English in 1977 with a preface by Erich von Däniken, it was more likely an imaginative creation by Brugger. The Chronicle builds upon existing folklore about hidden underground cities in South America.