The Neuroi still remain a threat, but the defense lines against them have stabilized enough that things have been relatively peaceful since the battle against the underground Neuroi. Miyafuji Yoshika has even managed to settle in at a medical school in Helvetia and make a new friend while awaiting the order to reform the 501st Joint Fighter Wing. That may come sooner than later, as during a visit by the retiring Mio, Yoshika gets wind of trouble at sea. In rushing to help out, she discovers that the Neuroi have learned a new trick.
