With the Metazone temple operation ending in failure and the flag still eluding them, the SDAC unit comes under heavy scrutiny from U.N. Command. As investigations begin, the frontline base is attacked by a mysterious new bipedal machine, the XR-2 Longku. Defense operations fall to Lt. Ichiyanagi, using his newly delivered HAVWC equipped with an experimental neurologically-linked control system. Meanwhile, within Uddiyana's capital city of Subasci,...