After discovering that the Neuroi are able to communication with people and making peace with the nest above Gallia, the Witches squads are on a mission to reestablish communication, when a sudden assault causes the Neuroi to fade. The Witches uncover a brand new and big nest that simply appeared, protecting nearly all Europe. Ruthlessly and with out mercy it annihilates allied forces together with Witches. Word of the assault reaches Fuso and a help battalion is deployed to rescue the survivors. Among the rescue crew is the previous Striker captain Mio Sakamoto and the now civilian Yoshika Miyafuji, who wish to save their expensive associates.