Once before, the ravishing lake mermaid Undine has warned her lover Raoul. Their humid-romantic fairy-tale love is in danger because Raoul's brother wants to destroy the pristine mountain lake idyll with an ambitious hotel project. Undine defends her paradise. She is alluring, but also perverse and unpredictable. She can give a lot of love, but she can also kill.
Unfortunately the movie Undine is not yet available on HBO Max.
| Writing | Eckhart Schmidt | Writer |
| Art | Udo Karohl | Art Department Manager |
| Production | Eckhart Schmidt | Producer |
| Crew | Maria Lusia Pino | Special Effects |
| Editing | Eckhart Schmidt | Editor |
| Camera | Philipp Geigel | Assistant Camera |
| Sound | Joseph Hölderle | Music |
| Sound | Angelika Krämer | Dialogue Editor |
| Editing | Andreas Treske | Assistant Editor |
| Camera | Michael Praun | Clapper Loader |
| Production | Karl Margraf | Production Manager |
| Production | Anja Schmidt-Zäringer | Production Manager |
| Production | Susann Kristin Friedrich | Unit Manager |
| Sound | Albrecht Harms | Sound Recordist |
| Costume & Make-Up | Susanne Kalwa | Wardrobe Designer |
| Costume & Make-Up | Sibilla Pavenstedt | Costume Design |
| Sound | Michael Kranz | Sound Mixer |
| Directing | Werner Kiefer | Continuity |
| Camera | Ronald Simoneit | Still Photographer |
| Camera | Anette Haellmigk | Assistant Camera |
| Production | Edith Götsch | Unit Manager |
| Directing | Eckhart Schmidt | Director |
| Camera | Bernd Neubauer | Director of Photography |
