The pilots of the battle carrier "Hiryuu Kai", which fought with the Hagane during the DC and L5 campaigns, are undergoing training. Katrina's Octo Squad, Tasuku, Leona, and Russel, each launch in their own units. Meanwhile, the space fortress "White Star", formerly the base of the aerogaters that attacked the earth, is attacked by a mysterious force. The force also appears at the Mao Industiries moonbase, and Ryoto, Rio, and Rin, who are loading a new unit for transport, recieve a message. "Hand over the Huckebein.