A group of eternally young fighter pilots known as Kildren experience the sudden loss of innocence as they battle the enemy in astonishing dogfights above the clouds. With his only childhood memory consisting of intense flight training, the fearless teenage pilot Yuichi's dogfights coexist with his struggle to find his missing past. When his beautiful, young female commander Suito is reluctant to discuss the fate of the pilot that Yuichi is replacing - or the strangely perfect condition of that pilot's former aircraft - Yuichi's curiosity becomes heightened.