Continuing from the previous episode, Ultraman briefly battles Gudon and Twin Tail before he is forced out of the fight after his color timer indicator expires. Thankfully, the two creatures -- one the natural predator of the other -- begin fighting one another, and end up taking their differences out to sea. The trapped civilians are rescued, but Aki is seriously injured. Goh, angering his teammates once more, decides to stay at her side till she's well again. Meanwhile Gudon and Twin Tail surface once more and Tokyo is ordered to be evacuated.
二大怪獣の猛攻に、さしものウルトラマンも敗れた。MATのＭＮ爆弾も効果がない二大怪獣に対して岸田長官はスパイナーの使用を決断するが、加藤隊長は激しく異議をとなえた。小型水爆級の威力があるスパイナーを使用したら、東京は壊滅してしまう。隊員達はMATの解散を賭け、スパイナーを使用しない作戦に挑戦する。
