The second wave is moments away from reaching Earth and everyone is prepared, with the Great wall all but set up, and the tatsonaut generators powering and protecting the Earth and the Moon, and the various Langrange points.
Kaedes and Biancas are currently in space to destroy any fragments that may prenitrate the Great wall, and repair any holes in the wall that may occur.
While Shima is out in space with most of the other students readying herself with the big 4 also, Shima's freinds are closely observing the events as they happen along with everyone from the earth.
Shima saves a pilot whose ship was about to be hit, but unfortunately something went wrong. The pilot was saved but the barrier that Shima was trying to set up to destroy the rock didn't work, and her ship was slightly damaged.
Shima suffers a lose of confidence and returns to the Stellvia, but is soon cheered up by Arisa and Rinna as well as her overfriends, as the realisation that she saved someone kicks in, and she regains confidence.
But there's a problem - a titanic-sized asteroid has penetrated the Great wall. While the big 4 and the other students try to destroy it with the lasers, on their Biancas/Kaedes, it just isnt having much effect
The teachers onboard Stellvia as well as Kouta/Shima and her friends decide that the only way to destroy the asteroid is with the Infinite Robot, as they launch and destroy the asteroid, they repaired the breach in the Great wall, as the second wave passes...
The earth is well.
バリア前にむらがるケイティ部隊の後方に配置される志麻たちのビアンカ。そしてついに、セカンドウェーブがやって来た。全システムが正常に稼働し、セカンドウェーブによる衝撃をすべて吸収。グレートミッションは成功したと思われた。ところが、突然ステルヴィアに大きな衝撃が走る。いくつものいん石がバリアを突き破ってきたのだ。
いん石を次々と撃ち落とすケイティ部隊。光太もいん石をみごとにヒットしていたが、志麻はよけることでせいいっぱいだった。ところが、操縦不能におちいった一機のケイティにいん石が接近。それに気づいた志麻は、いん石とケイティの間に割って入り…。