A man lives like a hermit in a forest in Lozère and records the sound of the animals living around him. To capture these invisible presences, he has placed microphones in different positions around the forest. He listens from his cabin for the sounds they pick up, notes and classifies each presence, naming it and archiving it away. One night, he hears a cry he does not recognise. He goes looking for the creature that made the sound and meets Mana, a young girl who communicates with the birds. She joins his quest, which leads them to an abandoned mine, after a storm.