The great earthquake continues to wreak havoc upon the battlefields of Yggdrasil. Witnessing the collapse of the Gjallarbrú Fortress, Nobunaga wastes no time ordering a full assault, forcing the Steel Clan to fight a perilous retreating battle. Meanwhile, Sigrún, swept away by the surging waters of the Körmt River, finds herself forced into a deadly duel with Shiba, the mighty general who had defeated her just months earlier. Faced with their greatest threat to date, can Yuuto find a path to survival for the Steel Clan?!