It was written by Olivera with Osvaldo Bayer and Fernando Ayala, based on Osvaldo Bayer's renowned novel Los vengadores de la Patagonia Trágica ("The Avengers of Tragic Patagonia"), which was based upon the military suppression of anarchist union movements in Santa Cruz Province in the early 1920s.
Olivera, Osvaldo Bayer, and Fernando Ayala wrote this work based on Osvaldo Bayer's acclaimed novel Los vengadores de la Patagonia Trágica ("The Avengers of Tragic Patagonia"), which was derived from the military crackdown on anarchist labor unions in Santa Cruz Province during the early 1920s.