Ṣeto ṣaaju Mobile Suit Zeta Gundam, Itan naa tẹle Ẹgbẹ Idanwo Titani, Ẹgbẹ Black Otter, lori iṣẹ-apinfunni wọn lati ṣe idanwo awọn ipele alagbeka titun fun awọn Titani. O bẹrẹ pẹlu Eliard Hunter, awaoko ọkọ ayọkẹlẹ alagbeka ti Federation Federation ti a fi sọtọ si awọn Titani ati gbigbe si Aswan, olukọ kilasi Alexandria kan. Nibe o pade Carl Matsubara, alabaṣiṣẹpọ Titani miiran, Audrey Kẹrin ti o jẹ awakọ awakọ ati olori awọn iṣẹ idanwo ati ikojọpọ data, ati Wes Murphy, oniwosan ti Ogun Ọdun Kan ati Ija Delaz. Ẹgbẹ Black Otter kii ṣe awọn ṣiṣe idanwo nikan, o tun kopa ninu awọn iṣẹ apinfunni gidi si Zeon Remnants ati nigbamii, si AEUG.
