S1 E1 • Chapter 1

The Moore Brotherhood's Beehive flagship launches a squadron of GMs across the Thunderbolt Sector to break through the Principality of Zeon's defenses, only to be shot down by the Living Dead Divison and their Big Gun units. Io Fleming, who manages to eject from his GM, guns down a Rick Dom pilot before commandeering the mobile suit and returning to the Beehive with the sniper location data. He is then assigned to pilot the new Full Armor Gundam prototype, which he uses to flush out three Big Gun units. Living Dead Division ace sniper Daryl Lorenz vows to avenge his fallen comrades and kill Io.

S1 E2 • Chapter 2

During the Full Armor Gundam's second sortie in the Thunderbolt Sector, Io once again confronts Daryl. Daryl narrowly escapes after throwing a Cracker grenade at the Gundam, but he loses his left hand in the process. As the Living Dead Division is desperate to hasten the Reuse P. Device project to combat the Gundam, Daryl has his right hand amputated so that his body will have full control of the experimental Psycho Zaku.

S1 E3 • Chapter 3

The Moore Brotherhood receives reinforcements from the Earth Federation, but the new mobile suit pilots are young teenagers, much to Io's chagrin. Feeling the pressure of the war, Claudia resorts to drugs before Io snaps her out of an overdose. Io leads the young cadets to break through the Living Dead Division's final defenses, but the battle becomes a massacre due to the young pilots' inexperience.

S1 E4 • Chapter 4

With both sides suffering massive casualties, the Full Armor Gundam engages in a final showdown with the Psycho Zaku. Meanwhile, the surviving members of the Moore Brotherhood board the Dried Fish to take it over, but the remaining members of the Living Dead Division refuse to be taken prisoner and plan to self-destruct the vessel along with everyone on board.