Oh, my! I never really planned for the ending to take this long to be written, but I guess that's what you get for not taking in account the difference between being home with a broken foot and free to write all day long and being back to work, getting your ass kicked left and right. So...
I feel I owe you guys, first, a huge apology for leaving you hanging for this long and second, some sort of resume of what this story has been about so far, for those of you still interested.
It goes like this: a long, long time ago, in a galaxy far away...
What? Wrong one? Ok, fine!
This story happens a few months after Aramis, Athos and Porthos become good friends. The fact that Aramis is the only Musketeer to have come back from the massacre of Savoy is unknown to all but Captain Treville at this point. Treville has chosen to keep this a secret because he suspects the Cardinal had a hand to play in what happened and he fears what consequences it might bring to Aramis if it became a known fact.
Even so, the Cardinal hears whispers of one survivor and sends three Red Guards, Jacques Bennoit, Etienne Cussac and Gerard Gillion, led by Rochefort, to infiltrate the garrison and steal whatever records Treville has on the matter. They set the armory to explode, to cover their tracks, but only Rochefort manages to escape. Jacques and Etienne both die during the events following the explosion and Gerard is captured, only to be later murdered and used to frame Aramis for his death.
Knowing of Aramis' past as a spy, Treville and Aramis come up with a plan to lure the Cardinal into showing his hand: taking advantage of a mishap during one the King's hunts, the Captain punishes Aramis in front of the whole garrison, making sure that he falls into disgrace and making it believable that none will come to his aid if he is taken by the Cardinal. The Cardinal wastes no time in taking advantage of that and once Aramis is in his possession, through Rochefort, the second part of the Musketeers' plan is put into action.
Believing that he has broken Aramis' will and that the man will confess to anything to escape more pain, Rochefort is fooled into believing that a signed confession, implying his name and the Cardinal's, is in the possession of Treville's fictional lover, madame Bonacieux. Making himself pass as a Musketeer, something that would be seen as high treason, Rochefort procures the letter from Constance, but is soon captured by Treville.
Figuring out that Aramis was taken to the vast network of tunnels underneath Paris, Porthos decides to share his connection to the Court of Miracles with Athos and seek the aid of someone there who knows his way around. Bourdon, the current king of the Court, wants something in return for his aid; he ropes Porthos into killing the best thief in the competition, a woman working for Sarazin. Porthos agrees, both to save Athos life and to find where Aramis is; also, being the cunning man that he is, he has no intention of killing anyone, only fool Bourdon into thinking he did it (couldn't go off and just kill Milady before she becomes a part of the story, could I?)
Athos makes a new friend and ally, Charlotte, a young girl who refused to help Aramis because he was a Musketeer but slowly changes her mind about men in uniform. She helps Athos escape the Court and reunite with Porthos. Both follow her to the last place where she saw Aramis. Upon arriving there they find him gone.
Aramis, delirious with fever and pain, follows an imaginary Marsac through the long tunnels, ending up lost and nearly dying before Athos and Porthos manage to find him.
And... that's about it, folks. The rest is -finally!- here...