After ten years abroad, Catherine returns to Luxembourg to catch up with her daughter Alba, brought up by Catherine's mother Elisabeth. She then kidnaps Alba and takes her on a trip to a lake up North.
The film is inspired by the true-to-life story of the discovery of the long-lost “Opus 28” manuscript from Norwegian composer Johan Halvorsen, originally performed in 1909 by Canadian violinist Kathleen Parlow, to whom the piece was dedicated.