An exploration of the Latin American protest song through performances and interventions by some of its most prominent figures: Pablo Milanés, Lilia Vera, Mercedes Sosa, Joan Manuel Serrat, Daniel Viglietti, Carlos Puebla, Sara González, and Gloria Martín. Filmed on the occasion of a concert organized by the University of the Andes at the Mérida Bullring, the documentary constitutes an essential record of the Nueva Canción movement as a continental cultural force within the broader context of the political struggles of its time.
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| Writing | Freddy Siso | Writer |
| Directing | Freddy Siso | Director |
| Editing | Freddy Siso | Editor |
| Camera | Oscar Chaparro | Director of Photography |
| Camera | Oscar Chaparro | Camera Operator |
| Sound | Francisco Ramos | Sound |
| Camera | Leopoldo Ponte | Still Photographer |
| Camera | Pedro J. Guillén | Still Photographer |
| Sound | Grupo Madera | Music |