The Blue Steel privateer group persists in their mission to convey blueprints of the Vibration Warhead Torpedo, a formidable weapon that could shift the course of the war, to the United States. However, a new adversary arises in the form of "The Student Council," a group of warships helmed by the lingering Mental Models, the avatars of the ships, who have yet to confront the enigmatic captain of the Blue Steel, Gunzou Chihaya. As the Blue Steel edges closer to unraveling the authority governing the opposition, Iona's past starts to shed light on the origin of the conflict and her rationale for aligning with humanity.