The episode begins with a full-scale war between Digald and Ra Kan's forces. They newly-deployed Metal Zi bullets give even Danbul's Konig Wolf the ability to annihilate Bio Zoids. Meanwhile, Ra Kan, Ruuji and Kotona head into the underground portion of Iron Rock. Here, they find Digald chasing Rinna and Nouga, though Kotona saves them. Above ground, Iron Rock is overwhelmed, and they request reinforcements. With Zairin's group being the closest to their base, he is assigned to deliver back-up. Rinna reveals that after Jiin's ascension to the throne, Digald had rounded up each and every one of Iron Rock's civilians, leaving only Rinna and Nouga in the town. She agrees to help them, to avenge her fallen comrades. They are led down an elevator and find a Zoid graveyard, inside of which the r