Si vous avez aimé Uchuu Kuubo Blue Noah

Année 2199. L'humanité vit ses derniers jours. La puissante flotte de la planète Gamilas envoie des astéroïdes radioactifs s'abattre sans relâche sur la surface de la Terre, la rendant inhabitable. Les survivants se sont réfugiés dans de vastes cités souterraines, mais la contamination radioactive s'enfonce toujours plus profond, et il n'y aura bientôt plus de refuge possible pour l'espèce humaine. Un message de Starsha, reine de la planète Iscandar, et détentrice du "Cosmo Cleaner D", une machine de décontamination, pourrait sauver la Terre du triste sort qui l'attend...

On January 1, 1995, a G-Reactive fighter plane was being tested, while it was hit by a mysterious rainbow light and disappeared. 5 years later, two boys, Billy Kimura and Penny Carter, meet at a train station where a new bullet train utilizing G-Reactive was being launched. However, to their shock, the train was hit by a rainbow beam of light, and disappeared. After a series of events and acquaintances, the two boys discover that aliens were beginning to invade Earth. Fortunately, scientists developed the Sky Knight, a fighter plane capable of defending the world. As the extraterrestrials begin to invade, Billy, Penny, and their comrades begin their attempt to save the human race from the alien menace.