Ulf, an acid-tongued German, is a renowned specialist in moths. Jota, a perceptive Paraguayan, is considered the country's greatest bird expert. They have been studying the forests of Paraguay for decades, witnessing the relentless deforestation and fires caused by man. Sebastián is a filmmaker fascinated with the Chaco, an ecosystem of dry forests in danger of extinction, considered the largest green mass in South America after the Amazon.