Xoel is a "landscape phonograph". What does that mean? He specialises in collecting the sound elements that make up a landscape. In other words, a sound ethnologist. In À Procura da Estela, Galician director Carlos Martínez-Peñalver Mas accompanies Xoel on a journey through Serra da Estrela (the highest mountain range in Continental Portugal), in search of sounds that are in danger of extinction. However, he soon realises that tourism has silenced the past, leaving his project in a limbo. One day, however, a mysterious melody leads him back to the mountain. A breathtaking journey through one of the last national regions still immune to human presence; a way to look at the landscape with your eyes closed.