16-year-old Maria is forced into Serra D'Aires convent, secretly run by Satanists.
You can now watch Love Letters of a Portuguese Nun online on the following streaming providers in the United States.
| Writing | Erwin C. Dietrich | Writer |
| Directing | Jesús Franco | Director |
| Sound | Walter Baumgartner | Original Music Composer |
| Production | Max Dora | Executive Producer |
| Production | Erwin C. Dietrich | Producer |
| Camera | Peter Baumgartner | Director of Photography |
| Writing | Christine Lembach | Dialogue |
| Sound | Hubertus Schmandtke | Sound |
| Editing | Marie-Luise Buschke | Editor |
| Production | Edouard A. Stöckli | Production Manager |
| Art | David Quintans | Art Direction |
| Sound | Klaus Kunsemüller | Sound |
