Ichiro, Jiro, Rei, and Beijinder discover that all four of them, as well as Reiko, are siblings. They are androids created from the same design by Dr. Komyoji. Together, they decide that they should go save Akida and prevent Gill from destroying the world.
They head into Tokyo to find a humongous robot built by Gill, called the Armagedon Lord, destroying it. They try and fight the robot but failed miserably. Ichiro, Rei, and Beijinder are captured, leaving Jiro by himself.
Jiro finds his way into the robot and find Akida in it's heart. Rei and Ichiro appears and beats Jiro up. Jiro is puzzled at why his brothers are attacking him when he suddenly goes unconscious.
When Jiro wakes up, he finds himself in a machine. Gill then comes into the chamber and explains to Jiro that he had installed a submission circuit into each of them (Ichiro, Rei, Beijinder, and himself). Gill then calls Beijinder into the room and turns the submission circuit in Jiro, on. Gill then orders Beijinder to look after Jiro while he destroys the country's capital.
Jiro tricks Beijinder into letting him go. Beijinder believes him and he heads out to find Akida only to discover that he's not there. Jiro's next target is Gill. He seeks out Gill and when Gill summons Ichiro and Rei to destroy Jiro, Jiro destroys them both. Gill is shocked at Jiro's behavior. Jiro then explains to Gill that it's the submission circuit that allowing him to lie, destroy his own brothers, and it's going to let him kill a human. He takes Gill by the head and squishes his brain. He says from that day foward, he shall at last become fully human and he really does.
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