The plot reflects the figure of Pascual Contursi, tango poet. In love with a singer, he leaves his wife and son to go with her. Some time later, the singer leaves him and he composes the tango that gives the film its title.
| Sound | Samuel Castriota | Music |
| Sound | Lucio Demare | Music |
| Writing | Lucas Demare | Writer |
| Sound | Francisco García Jiménez | Music |
| Directing | Lucas Demare | Director |
| Camera | Ricardo Younis | Director of Photography |
| Directing | José A. Martínez Suárez | Assistant Director |
| Writing | Pascual Contursi | Author |
| Writing | Francisco García Jiménez | Author |
| Sound | Pascual Contursi | Original Music Composer |
| Sound | Samuel Castriota | Original Music Composer |
| Sound | Antonio Scatasso | Original Music Composer |
| Sound | Eduardo Arolas | Original Music Composer |
| Sound | Lucio Demare | Original Music Composer |
| Sound | Francisco García Jiménez | Original Music Composer |
| Sound | Juan Carlos Gutiérrez | Sound |
| Editing | Nicolás Proserpio | Editor |
| Art | Jean de Bravura | Art Direction |