Il s'agit de la quatrième saison de l'anime Senki Zesshou Symphogear.

The Bavarian Illuminati has struck at SONG in a small South American country. It's up to the Symphogear weilders to fight them off and gain time for the non-combatants to escape.

The Bavarian Illuminati has followed SONG to Japan, and has a powerful new kind of Alca-Noise that they're using to trap the Symphogear weilders. Can they escape?

SONG brings the Valverde documents to a secret base dating from World War 2, but the Illuminati tracks them there as well.

Adam, the controlling director of the Illuminati, has used a powerful alchemic spell to destroy the Kazanari Organization's base. Now it's up to SONG to deal with the fallout.

The goal of the Alchemists is revealed as they try to stop the Symphogears from halting their march towards a more perfect world. Their final goal? The lunar ruins.

Shirabe and Kirika engage the Alchemists while the remainder of the team searches for a secret item that will allow them to use their Ignite Modules.

The group trains so that everyone can pair with any other team member and use their powerful Unison attacks. But Shirabe is having trouble pairing up with anybody but Kirika, because of her inability to trust others.

With what they've learned from the shrine, the Symphogear Wielders now know the full extent of the Illumanti's plan: they're going to use an ancient gate to summon the power of a god. Only one person can stop them: Hibiki, the "God-Killer".

The power of stars descends on Tiki. Despite the best efforts of the Symphogear Wielders, and some unexpected help, she completes the ritual and becomes a divine weapon.

The divine power chooses Hibiki as its vessel. To stop the worldwide disaster she could cause, the U.N. initiates a wide-scale attack on Japan.

Adam throws aside his pride and beauty and assumes the form of a huge monster. It will take the power of all six Symphogear Wielders to bring him down.