The film tells the story of Marcel and Catherine Cellier, who through their own love story, discovered a shared lifelong passion for the music of Eastern Europe. In the midst of the Cold War, the pair sets borders aside, collects and documents, in somewhat adventurous ways, sounds that were up until then completely unknown in the west. With innumerable radio transmissions and millions of sold records, Marcel Cellier makes this collected music internationally known and paves the way to success for musicians like the Romanian pan-flute virtuoso Gheorghe Zamfir and the legendary Bulgarian female vocal choir "Le Mystère des Voix Bulgares". On the tracks of the Celliers, the film travels to Eastern Europe to again find the protagonists from that time and let the wealth of their music live again. In the contrast of meetings from back then and today, a piece of contemporary history is experienced, which tells about the changes of people and their surroundings as well as the immortality of timeless music.