A bourgeois housewife's life is shaken by a series of anonymous letters that she periodically receives, increasingly obscene. At first, she believes the sender to be a complete stranger, then she begins to suspect her husband's friends. But she doesn't dare talk to her husband about the letters or their contents: she remains anxious, thinking about suicide, and always waiting for the postman.
| Writing | Ignácio de Loyola Brandão | Novel |
| Directing | Roberto Henkin | Director |
| Writing | Roberto Henkin | Writer |
| Camera | Sérgio Amon | Director of Photography |
| Production | Betty Perrenoud | Executive Producer |
| Production | Ênio Ortiz | Executive Producer |
| Production | Marta Peloçoli | Executive Producer |
| Production | João Guilherme Reis e Silva | Production Director |
| Directing | Ana Luíza Azevedo | Assistant Director |
| Art | Rochelle Costi | Art Direction |
| Art | Fiapo Barth | Art Direction |
| Camera | Roberto Henkin | Additional Photography |
| Sound | Glauco Sagebin | Music |
| Editing | Giba Assis Brasil | Editor |
| Production | Roberto Henkin | Producer |