Undine is a historian who works as a museum guide in Berlin, Christoph is a diver. They meet in this existential love story, full of splendid imagery, surprising turns and effortless movement of camera and story alike. Christian Petzold – cinematic master and close observer of German realities – dives into completely new territory here. He presents a fairytale-love-story – but of course making it uniquely his own by embedding it in present-day Berlin. He reworks the myth of a mysterious water spirit as a modern fairy-tale in a disenchanted world.