A musical voyage into the heart of the largest country in Latin America, a legacy of the successive inhabitants of Brazil: Indians, Europeans, Africans... All these cultural influences have piled up in the same way that geological stratifications do, offering a variety of rhythms: Forró, Frevo, Embolada, Samba... To make this documentary, the Finnish director Mika Kaurismäki has traveled 4,000 kilometers, crossed three states in the Northwest of Brazil, and spoken to more than thirty musicians, most of them street musicians and unknown to foreigners.