The film takes a close look at the controversy surrounding the construction of a huge dam on the Xingu, a tributary of the Amazon, in the Brazilian city of Altamira. Getting to the heart of the matter, Lee shows various stages of the negotiations and reactions surrounding this absurd and illogical project from a sustainability perspective, whose effects promise to be devastating for the environment and biodiversity. During the largest demonstration of the indigenous inhabitants of Brazil, who are directly affected, the indignation turned into terrifying violence against the decision-making authorities. The violent reactions were aimed solely at protecting these people's villages, their future, and their river, the very heart of their collective existence.