Riccardo, belonging to an upper-middle class family from Puglia, studies religion in a Swiss boarding school. He has an incomplete relationship with his half-sister Stefania, who one day announces his engagement and the next marriage. Riccardo, wearing his cassock below, desperately tries to conquer the now reluctant half-sister.
Unfortunately the movie Calamus is not yet available on HBO Max.
| Directing | Massimo Pirri | Director |
| Production | Benedetto Conversi | Producer |
| Writing | Pier Giovanni Anchisi | Writer |
| Editing | Cleofe Conversi | Editor |
| Art | Ennio Michettoni | Art Direction |
| Camera | Riccardo Pallottini | Director of Photography |
| Sound | Claudio Tallino | Music |
| Writing | Massimo Pirri | Writer |
