While searching for their estranged mother, two beautiful sisters, Dagmar and Ursula, arrive at a luxurious seaside hotel. At the same time, a mysterious killer starts murdering promiscuous women in the area.
Unfortunately the movie The Sister of Ursula is not yet available on HBO Max.
| Directing | Enzo Milioni | Director |
| Writing | Enzo Milioni | Screenplay |
| Production | Armando Bertuccioli | Producer |
| Production | Francesco Bertuccioli | Producer |
| Sound | Mimi Uva | Original Music Composer |
| Camera | Vittorio Bernini | Director of Photography |
| Editing | Francesco Bertuccioli | Editor |
| Art | Natalia Verdelli | Production Design |
| Costume & Make-Up | Patricia Merluzzi | Costume Design |
| Directing | Adalberto Ceccarelli | Script Supervisor |
| Costume & Make-Up | Carlo Sindici | Makeup Artist |
