As Heero and Zechs come to the end of their final duel, the battleship Libra and Peacemillion descend upon the earth threatening to engulf the world in a never ending winter.... Meanwhile Trowa helps out the wounded Quatre, and Duo delivers the "lords of plague" to peacemillion, in the hopes of averting the tradgedy of the battleships plunge.

Heero plans to destroy the Wing Gundam before it is discovered by the Alliance forces. Heero gets his hands on two torpedoes and attempts to destroy his Gundam. Relena, refusing to believe Heero's threat, tries to confront him but is interrupted by the arrival of Duo Maxwell...

L5's Wufei Chang, in his Shenlong Gundam, attacks the Taurus MS's transports after coming into Lake Victoria base late at night. Lucrezia Noin, head instructor at the base and good friend of Zechs Merquise, tries to fight him off in her Aries MS.

Lady Une makes the Gundams her next target and activates the self-destruct sequence on the New Edwards Base. Can Heero prevent the explosion of the New Edwards Base and find the person who set them up? Meanwhile, Wufei duels with Treize.

The Gundams have been defeated. With the colonies used as shields, the pilots don't have a chance. No one knows whether Heero is dead or alive. On the trail of her father's killer, Relena heads to Moscow. Duo and Quatre take refuge with the Maguanac Corps.

Two misguided OZ soldiers are going on an execution spree, destroying any remaining Alliance resistance. In an effort to save the colonies, Trowa heads for his final battle. However, Catherine stands between him and his death wish...

Zechs' warrior nature craves a decisive battle. Noin invites Heero to Antarctica, where Zechs awaits. Suspecting that Zechs has violated the order to destroy Zero One, the Romefeller Foundation sends troops after him.

At the South Pole, Zechs waits with the newly-rebuilt Wing Gundam. After Herro arrives and the rematch begins, Relena arrives and tries to stop them from wasting their lives. However, she discovers a revelation...

OZ sets in motion its plans to destroy the Alliance military once and for all. Quatre and Duo head to outer space to warn the colonies of the impending danger, only to discover they've been declared the enemy.

The fight between the Tallgeese and the Gundams conclude. Now, Zechs refuses to fight for, and ends his affiliation with the Romefeller Foundation.

With Lady Une's help, Duo escapes from OZ and goes to destroy the Mobile Suit production base on the moon. But while there, he meets a girl named Hilde who has become a soldier. The choice is suddenly much more complicated.

A Mobile Suit with fantastic power is on a rampage. It's attacking the colonies one after another in a brutal display of raw power. Trowa and Heero move to intercept this strange new Mobile Suit and are surprised by who its pilot is...

Treize is freed by OZ soldiers loyal to him, but the trouble is only beginning. Romefeller is out to eliminate the Gundams and Treize, since they are symbols of hipe. Operation NOVA commences, and all of the Earth is in danger.

Relena, thinking back on past events, becomes determined to put an end to the Romefeller Foundation's tyranny.

Still in space, Duo has been retaliating against OZ. But OZ closes in, and Duo and his incomplete Gundam Deathscythe Hell must fight the Wing Zero.

Zechs steps onto the battlefield once again and attacks Romefeller's forces. Meanwhile, Heero heads off to help the Treize Faction.

Zechs gets the Wing Gundam Zero and demolishes the OZ forces. However, Treize gives Heero a new Gundam, perhaps the most terrible Gundam of all, and its name is Epyon...

Wanting to join the Gundam pilots in their fight, Zechs goes to meet Wufei, But Wufei, pilot of the new Altron Gundam, believes him to be the enemy.

Relena, now a prisoner of the Romefeller Foundation, is faced with a very difficult choice. Meanwhile Heero and Zechs engage in battle once again-this time on the grounds of the Sanc Kingdom.

Quinze, the leader of the White Fang, contacts Zechs and asks him-and his Gundam-to join their cause. Still suffering from amnesia, Trowa once agian goes into battle.

Relena's plead for her brother to stop the war goes unheeded. The Gundam pilots battle their way though a fierce encounter with Mobile Dolls under Dorothy's control.

Milliardo leaves Quinze in command temporarily as he takes a rest. The Mercurius and Vayeate are once again used against the Gundams. However, this proves to be the two Mobile Suits' last battle.

Heero manages to get into the Libra and reunites with Relena to confront Milliardo. Treize challenges Milliardo with his new Tallgeese II Mobile Suit. To try and eliminate Treize, he fires the Libra...

The five Gundams launch their ultimate offensive knowing that only mass slaughter and a sad battlefield awaits them. The Peacemillion space fortress rams the Libra to block White Fang's way to Earth, even if it will bring their own death.

While Wufei fights Treize, Quatre fights Dorothy, Trowa tries to change his destiny, Duo frees the scientists, and Heero looks for Milliardo for the last round of their duel.