2150 A.D. The battle against the Festum, the silicon life-forms from distant outer space, has reached a new dimension. The North Polar Meir that was destroyed during the First Azure Operation has scattered its fragments all over the world. They have begun to operate independently as separate Meirs. Most of the Meirs harbor hatred towards humanity and challenge them to fight; however, a portion of the Festum has chosen coexistence with mankind. Amidst the chaos, Ryugujima island has vanished from the battlefield and remained silent. The island has gained a means to communicate with the Meir since their encounter with Misao Kurusu two years ago. The children of ALVISS have been searching for a way to understand the enemy as they prepare for battle. And now, once again, further evolution is about to unfold on the island. A girl who understands the language of the Festum, and a girl protected by a Festum. When the two meet, the doors to a new universe open.
