The drought in Sao Paulo is the starting point of the journey. Uneasy with the images of empty reservoirs of hydrodams in southeastern Brazil, a filmmaker seeks to understand these pharaonic constructions, now built in the middle of the Amazon rainforest. Among the Xingu, Tapajós and Ene rivers, echo the voices of riverines, indigenous people and fishermen and those affected by the arrival of so-called development. A boat movie and a reflection on the impact of our lifestyle.