The great fadista, Amelia Rodrigues, made her screen debut in Capas Negras, which took its name from the black capes worn by the students in the university city of Coimbra, where the film is set. The action begins in a tavern where a group of former students are reminiscing about their time at the university. One of the students, Jose Duarte then breaks into song, performing an impromptu fado in the local Coimbra style. The tavern owner's niece, the aptly named Maria Lisboa promptly retaliates with a fado of the Lisbon variety. The melodramatic plot then centers on the frustrated romance between these two characters, and the soundtrack is essentially a musical duel between these two different styles of Portugal's national song.
| Directing | Armando de Miranda | Director |
| Writing | Alberto Barbosa | Screenplay |
| Writing | José Galhardo | Screenplay |
| Production | Armando de Miranda | Producer |
| Production | Edmundo Ferreira de Almeida | Producer |
| Writing | Luís Galhardo | Screenplay |
| Sound | Jaime Mendes | Music Director |
| Crew | Octávio Bobone | Cinematography |
| Editing | Armando de Miranda | Editor |
| Art | Armando Bruno | Set Decoration |
| Costume & Make-Up | Augusto Madureira | Makeup Artist |
| Production | Edmundo Ferreira de Almeida | Production Manager |
| Sound | Heliodoro Pires | Sound Director |
| Sound | Raúl Ferrão | Songs |
| Sound | Santos Moreira | Songs |
| Sound | Alberto Ribeiro | Songs |
| Sound | Frederico Valério | Songs |
| Crew | Fernando Gomes | Production Office Assistant |
| Crew | Firmino Miranda | Production Office Assistant |
| Crew | Vítor Raposo | Production Office Assistant |
| Crew | Fernando Silva | Production Office Assistant |
| Crew | Patrício Álvares | Production Office Assistant |
| Production | Fernando Maynard | Production Office Coordinator |
