The story of two siblings who witness the murder of their parents in the hands of one of the drug cartels in Mexico, after which Alejandro Ferrer's younger sister is kidnapped. 25 years later, Alejandro is now the captain of the Federal Police and seeks revenge against the narcos for destroying his family.

Mercedes Sosa making of her last album depicts encounters with other characters, creative moments, testimonies of the artists who participated and reflections of Mercedes Sosa about her life and the recording of "Cantora".