Shin Kidou Senki Gundam Wing: 
Endless Waltz OAV 1
"Silent Orbit"
Line

Endless Waltz begins on AC 195, Christmas Eve. Images of the final battle in space with the White Fang Colony and the Earth's government appear. The scene changes to Sally Po (Codename: Water) is commenting on an object in space containing Neo-Titanium. Confusion is expressed on her face. The Heavy Arms, Wing Zero, Sandrock, and Deathscythe are being loaded into 'hangar block' and sent to the sun. However, Wu-fei did not bring his to be sent to the sun. On Endo, Noin and Lady Une take part in an end-of-the-year celebration. The president stands behind a podeum, making a speech on peace between the Colonies and Earth. Lady Une and Noin turn to leave, commenting on how the president knows how the millitary is still needed, even though there is peace.
Sally Po in space communicates with Noin, who is in Edo. Sally Po voices her opinions on how someone may be making Neo-Titanium. They discuss on whether it could be used to make a New Mobile Suit. Sally Po only says that they may have to stop this manufacturer.
Relena Peacraft, now the Foreign Prime Minister, is sent to colony L3-X18999. The representatives there ask for Relena to stay and help. However, Relena takes a sip of tea and falls unconsious. She had been drugged. Suddenly, men in red coats and yellow tries rush in and are given oreders to take Relena away.
Meanwhile in the circus, Catharine and Trowa see a handful of men standing in the stands, wearing black. Trowa disappears to 'take care of them' while also finding out that they are from the 'Barton Group'. Trowa thinks back when Heavyarms was still in making, how a man brought him aside and showed him a picture of a little girl, Marimeya. The man explains how she will be the ruler.
While Heero, in front of a computer checks up information on the Bartons. Duo comes in a comments on Heero working on Christmas. Heero promptly ignores the comment, walking out the door saying that Relena had been kidnapped.
However, on Colony L3-X18999 a man standing in front of many men in red uniforms and grey/blue uniforms expresses the need to help Marimeya-sama reach her goal. The man finds out that Trowa is hiding in the group. Trowa jumps up to the man and tries to kill him, only to find Wu-fei challenging him with a sword.
Noin (Codename: Fire) is communicating to Sally Po through a screen reagrding the Colony L3-X18999 receiving Neo-Titanium and declaring independence. Sally Po explains how the leader is Marimeya Barton and how not only is it too late to stope them, they have captured Relena.
Relena awakens to be greeted by a small girl with orange hair. She introduces herself as Marimeya Kushrenada, the daughter of Trieze Kushrenada. Relena expresses her surprise in this news, only to be quieted by Marimeya. Marimeya also refuses to tell Relena why she has brought her here.
In a ship headed towards Colony L3-X18999, Duo and Heero try to rescue Relena. Heero has a brief dream of one of his missions. During it, he meets a girl with a small dog which talks to him for a little while. Then, come night, Heero explodes an area filled with mobile suits. However, one suit accidently falls on a civilian building, coincidently the one where the young girl lived. Heero walks there to see that the small dog is dead in the snow and possibly the girl too. (A picture of the teddy bear in the TV opening scene is also in the snow) Heero picks up the dog and a conversation between Dr. J and someone else is heard in the background. They fight over how Heero accidently destroyed a civilian building of innocents. Duo wakes Heero up telling him that Marimeya is going to make an annoucement. Duo points to the screen, just as Marimeya makes her speech. The Colony is declaring independence.
Noin and Sally Po voices their confusion when Marimeya says that she is Trieze's daughter. A man calls Lady Une, berating her on how she let this happen on one of the colonies. Lady Une argues how she may not be able to do much, only to be hung up by the man earlier. A man with long, blond hair comes out. Lady Une gasps almost saying his name. He says that his codename is 'Wind'. (Suspicously looks/sounds like Zechs Merquise/Miliardo Peacraft)
Heero and Duo converse about how they are going to get into Colony X-18999 and steal a mobile suit. Sally Po and Noin get a signal that another ship is coming towards L3, only to find that it is Duo and Heero. They speak and Noin and Sally Po decide to distract L3 while Duo and Heero manuever into the base.
Duo drops 'boxes' of explosives which open up to seek and explode the enemy attacking them. Duo hurls the shuttle at them and uses a small red ship, fly into an opening...or rather..crash. Noin and Sally Po leave, confident in Duo and Heero's sucess.
Quatre and his team are trying to catch up to teh Gundams by taking a separate route, finding out teh Gundams are still needed. While back at the colony, Duo and Heero force there way in with stolen mobile suits. Duo is greeted by Trowa, and Heero must get past Wu-fei, who is in his Shenlong Gundam.
Continued in OAV 2 "Operation Meteor"...