The Amazon has long been perceived as an inhospitable area, populated by indige­nous tribes who lacked history and culture. Everything changed with the discove­ry of exceptional sites in Colombia and Brazil, presenting astonishing rock paintings dating back more than 12,000 years. Who were the first inhabitants of the Amazon? Where did they come from? And most importantly, why did they disappear? Alongside a team of archaeologists, this documentary takes us on an expedition at the heart of the Amazonian forest, to finally unravel the mystery of this ancient civilization.