A girl named Hibiki Tachibana attends a concert held by Tsubasa Kazanari and Kanade Amō, who form the pop duo, ZweiWing. In the middle of the concert, the stadium is attacked by an alien race known as Noise who begin killing the attendees. Tsubasa and Kanade summon mechanical battle armor known as Symphogear to fight off the Noise, but soon find themselves in a pinch. Kanade tries to protect Hibiki, but she is hit by a stray fragment of Kanade's armor. With her suit losing power, Kanade sings a song that destroys all the Noise, but at the cost of her own life. Back in the present, Hibiki, who…