On the Teltain, Futtor insists that they must leave Sunsa now that Ypsilon has been recovered. Arron and Gurran reply that their mission take precedent. Ypsilon must be allowed to fight Chirico again, and they must stay to observe.

On Rochina's ship, Chirico fine-tunes a Scopedog and writes himself a new mission disc containing everything he knows about the maneuvers of a PS. Fyana speaks with Chirico, admitting she is afraid for him, but he counsels her to accept what must happen. Ypsilon is fighting out of loneliness, and will not stop until one of the tem is dead. Ypsilon, meanwhile, renews himself with a jijirium bath and launches for the surface in a new Strikedog.

On the other side of the galaxy, Melkian General Karmeny meets with Battentain to discuss the implications of what has happened in the Nonaggression Zone. Battentain is shocked to learn of Rochina's defection, and admits he never quite knew how to read the man. Despite the risk to the peace treaty, a task force of Gilgamesh battleships must be sent to Sunsa with Rochina as their target.

Chirico crosses the Sunsa desert to Siguray Crater, where Ypsilon's empty landing craft stands waiting. Chirico takes the bait, and the battle is joined! This time there are no distractions; the two clash with each other time and again. Chirico's mission disc works perfectly, allowing him to match Ypsilon move for move. Rochina takes notice and finally announces to Fyana what he has suspected all along: that Chirico is a true Perfect Soldier! And at long last, Chrico fires the fatal shot that takes Ypsilon down!

Before he can finish Ypsilon off, however, Chirico is interrupted by Fyana, who gives him the shock of his life - that he is more than human. Chirico insists that his mission disc is what allowed him to win, but then notices that the disc burned itself out only a few minutes into the fight. From then on, it was his own ability. Ypsilon insists in his final moments that Chirico has to be a PS...Ypsilon's pride would not allow him to die at the hands of a normal man.

Later, Chirico prepares to leave Sunsa, Rochina's words echoing through his mind: "You are a PS. You want proof? Then go to planet Quent. There you will learn everything."

"What was it that lay hidden in my past? I'd fought Ypsilon and won. But I couldn't believe it. There was no way I could be a PS. The Planet Quent...what awaited me there?"

Killy watches from his ship as the Gilgamesh fleet approaches Quent, where Rochina's Balarant fleet awaits them. Arron and Gurran report from the surface that they are safe, but their entire AT army was destroyed. Killy is content to wait and watch history repeat itself now that the power of Quent is reawakening.

Admiral Lepard speaks with General Battentain, who warns him about what he is walking into. Someone has been tampering with the secrets of this planet, perhaps even the lost Perfect Soldier.

Arron and Gurran watch as Lepard lands and is greeted by Rochina. The two officers begin their verbal fencing, Lepard demanding that the Prototype be returned. Rochina attempts subterfuge, but when Gotho, Vanilla, and Coconna appear, his lies about losing contact with Chirico and the Prototype are revealed. Recovering, he offers to rendezvous in orbit and bring the Prototype with him. Everyone who watches the proceedings know what a risk this will be...especially with Chirico involved.

Chirico infiltrates Rochina's AT platoon, and the Balarant fleet lifts off into space to play its part in the deadly game. Rochina's landing party docks with Lepard's ship, and he produces Fyana, insisting that the Gilgamesh now leave Quent. Lepard refuses, but as a Scopedog steps forward to seize Fyana, Chirico makes his move, striking out from inside a Balarant Fatty. Rochina escapes with Fyana, and the Battle quickly escalates into an all-out bloodbath!

Chirico takes a moment to free Gotho and the others, then escapes outside into the escalating firefight.

"The battling had turned more intense than I expected. And then somewhere in my body, I felt it. A premonition. Yes, one from the darkness, for only me to know. And that's when the whole horrible thing happened..."