This vibrant feature documentary explores this iconic and era-changing time in Brazil's history with material lovingly gleaned from the archives, stunning images, and the testimony of the group's protagonists including Caetano Veloso, Gilberto Gil, Tom Zé, Arnaldo and Sérgio Dias, from the band Os Mutantes, whose controversial thoughts, music and behaviour resulted in prison and exile for its leaders. Then of course there is the music, the Tropicalistas created pop songs, mixing traditional Brazilian folk and the north hemisphere s rock which created a sound never heard before and which has since inspired and influenced many high profile musicians including David Byrne, Damon Albarn and Beck.