Nagate and Izana continue their visit while Yuhata and Tsumugi find a way to eavesdrop on them. Izana soon discovers that Nagate was set up by her grandmother. Meanwhile Sidonia arrives at the Lem Star System. A reconnaissance party of four pilots is... (more) send out, acompanied with a new propulsion and weapon system " the Hayakaze", to scout planet Lem IX. Izana is assigned last minute as a replacement pilot. In Lem IX orbit Izana detects an unknown object which is revealed of being a new type of armored Gauna. Both Nagate and Tsumugi watch the mission feed helplessly as Izana and her team struggle against it.