Through illustrations and sounds, Una vez la noche experiments with the obsessive narration of four diverse characters –all of which are lost in the settings of their memory– to exhibit crucial events that marked their lives forever. Through a particular mise-en-scène, the film provides apparently ordinary people with a brilliant singularity, introducing us to a new perception of reality.
| Writing | Antonia Rossi | Writer |
| Editing | Roberto Contador | Editor |
| Production | Antonia Rossi | Producer |
| Production | Roberto Contador | Producer |
| Directing | Antonia Rossi | Director |
| Editing | Antonia Rossi | Editor |
| Sound | Gustavo Guzmán | Original Music Composer |
| Camera | Pedro Micelli | Director of Photography |
| Production | Clara Taricco | Executive Producer |
| Writing | Roberto Contador | Writer |