Costian (Jean-Paul Rouve) is an ornithologist. His love for ornithology has made him devote his life to this field. The white-fronted geese who lost their parents cannot learn the skills of migration, so Costian decided to fly a light aircraft to guide the young birds to migrate from Norway to their destination, France. However, when applying for funds from the Paris Museum, Costian was rejected. Thomas (Louis Vazquez) came to his father's farmhouse for vacation. At first, the boy did not understand why Costian always cared so much about birds, but as time went on, Thomas was gradually attracted by the magical birds. One day, Costian was shocked to find that Thomas had secretly driven a light aircraft on a journey to guide bird migration.