Based on an original interview about the Curuguaty massacre, The Lost Voice interrogates Paraguay's recent history.
| Directing | Marcelo Martinessi | Director |
| Writing | Marcelo Martinessi | Writer |
| Camera | Luis Armando Arteaga | Director of Photography |
| Editing | Marcelo Martinessi | Editor |
| Production | Marcelo Martinessi | Producer |
| Art | Carlo Spatuzza | Art Direction |
| Sound | Catriel Vildosola | Sound |