Isla arrives at the Holy Spring, which is expected to be the center of the world. Flying students are impressed by the magnificent scenery. The city celebrates the arrival of the Holy Spring and is in a festive mood. However, the other day, it was confirmed that the Knights shot down and captured the "Clan of the Sky" with aerial power, and dark clouds rushed into the future journey.

Karuel wakes up when she hears from Ignacio that Ariel gives up the aviator because of an injury and Claire who reveals her identity leaves school because of herself. At that time, an alarm sounds in the sky of Isla. A sortie order was also issued to the flying air student, but it was to become a decoy of the observation aircraft ....