After the events of Senki Zesshou Symphogear G, Hibiki Tachibana, Tsubasa Kazanari, and Chris Yukine continue to work under the command of Genjuurou Kazanari. Meanwhile, Maria Cadenzavna Eve, Kirika Akatsuki, and Shirabe Tsukuyomi are placed in protective custody as peace is restored and everyone resumes their normal lives. However, the alchemist Carol Malus Dienheim and her subordinates, the "Autoscorers," pose a new threat and their intention to bring about the apocalypse by sacrificing everything. The six Symphogear wielders must use their magical powers to protect their world. Will they be able to stop Carol and her Autoscorers before it is too late?