With millions of records sold, thousands of concerts all over the world, and countless fans (and detractors), Mercedes Sosa left behind an indelible legacy. Featuring unforgettable performances that span Sosas 60-year career and interviews with musicians like Pablo Milanés, Chico Buarque and David Byrne, this stirring portrait takes us on an in-depth, intimate journey through her life, revealing an artist who became one of the most influential personalities of the 20th century.