The film centers on Asuna, a young girl who spends her solitary days listening to the mysterious music emanating from the crystal radio she received from her late father as a memento. One day while walking home she is attacked by a fearsome monster and saved mysterious boy named Shun. However, Shun disappears and Asuna embarks on a journey of adventure to the land of Agartha with her teacher Mr. Morisaki to meet a Shun again. Through her journey she comes to know the cruelty and beauty of the world, as well as loss.
- Other Title: Hoshi wo Ou Kodomo, Children who Chase Lost Voices from Deep Below, Journey to Agartha, 星を追う子ども, Children Who Chase Lost Voices, Viaje a Agartha
- Status: Completed
- Sub/Dub: Anime Dub
- Anime Type: Movie
- Genres: Adventure, Fantasy, Romance, Action, Seinen, Animation, Drama
- Characters: Canaan Praeses, Shin, Morisaki, Ryuuji, Watase, Asuna
- Score: 7.52
- Rank: 1677
- Popularity: 1090