Luke was wandering through the space port after leaving his mother's house, when he saw the Rogue One coming in for a landing. He hadn't seen his friends Jyn and Cassian in a while, so he rushed to the spot where their ship was setting down. As Jyn exited, his greeting died on his lips as he saw the look on her face, a look that said she was bringing bad news and that something had happened. This feeling intensified when Luke saw her parents exit behind her along with Baze, Chirrut and Bodhi, whom he knew were supposed to be on Jedha at the moment.
Before he could ask what had happened, Jyn held up her hand and said "I will explain later, but we must see the Council at once, can you help us?" Luke nodded and said "Come with me, I was soon going to be heading there myself." The group followed Luke to the Temple and through its many corridors, finally taking them right outside the Council room. "Wait here one moment." Luke said to them before entering through the doors alone.
Yoda looked up and asked "What is it, young Skywalker?" "I'm not quite sure Master. My friends Jyn and Cassian, along with Jyn's parents and a few from Jedha are outside with what I think is urgent news." Luke replied. "Show them in then." Obi-Wan said, from his position in the room, though he himself was there only via hologram, having left soon after Luke and Mara did with the Bridgers. Luke opened the door and said "Come on in." The group filed in and since he hadn't been dismissed, Luke stood quietly behind them.
"What news have you brought us?" asked Kit Fisto, also there via hologram. Jyn stepped forward and started her story from the beginning, though keeping it brief. When she had finished, the Masters all looked gravely at each other before Shaak Ti finally said "It is as we feared then, Maul has been spreading us thin for a reason." "Galen Erso, your daughter said it was a protoytype of something you were creating, does that mean you know of a way we can stop it?" asked Plo Koon.
Galen now stepped forward as he shook his head and said "I'm sorry Master Jedi, but they have changed so much of it, I couldn't say for certain. If I only had a reading of it I might be able to find one, but both times any of us saw it, we were more worried about escaping it then in actually collecting data." "Then that will be our first objective, getting that information." Depa Billaba said from her seat. "Safe no doubt the Dark Forces may feel, stay near Lah'mu they might." Yoda said to know one in particular.
"We don't have any Jedi in that area at the moment, and anyone close is tied up." Caleb said. "Skywalker, been to Lah'mu have you?" asked Yoda. Luke had thought they had all forgotten he was there, so he jumped a little when Yoda addressed him, but quickly gathered himself and said "A few times, Obi-Wan and I ran some stuff back and forth between us and the Ersos." "Go then, and scan the Death Star you must." Yoda said, with Obi-Wan adding "Be careful Luke, remember Maul and Leia could be on there and they could sense you." "Yes Master." Luke said, before bowing and exiting.
"Galen, would you be willing to help us find a way to stop it?" asked Shaak Ti. "Of course, Master Jedi." Galen responded and Shaak Ti said "Good, we will set you up with everything you need and as soon as Luke gets back with the data, you can get to work. In the meantime, you and your family should get some rest, that goes for those of you from Jedha as well. We will show you to a place where you can get some."
XXX
Luke hopped into one of the Jedi Star Fighters. It might be a bit obvious whose side he was on if he was spotted, but he wanted to have a ship he knew how to handle no matter what situation he found himself in. He had installed a hyperdrive in it personally, so at least he wouldn't have to worry about the ring being discovered, like any of the other Jedi had during the Clone Wars and even a few of the hold outs that were fighting the Dark Forces. When the war had started up, the Republic had provided them the funds necessary to make some more Star Fighters and Luke had returned his father's to him. Luke's what painted with dark blues and greens, something he was thankful for as it wouldn't make him as noticeable to the Death Star.
R2 rolled up to him and he said "Hey R2, you aren't out with my dad?" To which the droid beeped and Luke replied "Ah, a secret mission he couldn't take you on? How about coming with me? I need to scan a Dark Force craft called the Death Star. I could use a droid with your spunk out there." R2 beeped and whistled at that, causing Luke to laugh and say "Okay, let's get you aboard." R2 jetted up into position, settling in gently as Luke climbed in himself. After a flicking a few switches and pressing a few buttons, the Star Fighter gently rose into the air, Luke expertly piloting it out of the hanger and into the space above Coruscant as R2 programed the coordinates Luke told him to pull up. As the stars streaked around them, Luke wondered what he would exactly see on the other side of this journey.
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When he pulled out of hyperspace he was amazed at what he saw, or rather what he didn't see. Lah'mu was no more, all that was left in its place was what could easily be mistaken for an asteroid field. This was going to be harder than he originally thought. Many of the cruisers that the Ersos had mentioned appeared to have left the system, no doubt moving onto other targets now that they thought their secret was safe. But they had in no way left the Death Star unprotected either. Enough cruisers still remained that could easily take down a fair sized attacking navy, and Luke doubted that would change anytime soon.
At first he couldn't see the Death Star anywhere and thought it might have left the system, until he realized that what he had been thinking was the moon of Lah'mu was actually the battle station he had been sent to scan. Luke landed his Star Fighter on a nearby clump of what used to be Lah'mu and powered down as he said, "Okay R2, get to it, we don't want to be here any longer then we have to." The droid beeped his agreement before starting the scanning process. As he sat waiting, Luke saw small battalions of enemy ships flying in the distance and he realized only two things were keeping them safe.
One, nobody thought that anyone had made it off and two, because of this and the already low amount of traffic to Lah'mu, they didn't really expect to see anyone out here and were therefore not as diligent as Maul would want them to be. How long that would remain on his and R2's side remained to be seen, hopefully long enough to find something useful if not the whole thing. After almost an hour had passed, R2 beeped his success at having scanned the whole thing and Luke started powering up his ship. It was only then that he realized he hadn't sensed Maul's presence, a presence he would never forget, but he was picking up one that was sort of familiar, though now changed and twisted and even, did he dare hope, a little conflicted. Leia.
He thought about trying to find her, to try to talk her back into the light, but then he sighed. The mission was to important to take the chance that he might not succeed, that he might get caught and held or even killed before anyone found out the secrets the schematics that R2 had gathered held. Besides, if he went in there, he would give away the fact that they not only knew about Lah'mu and what had happened to it, but that they also knew about the Dark Forces ultimate weapon. With one last pain at the thought of leaving his sister behind, Luke said "Let's go home R2."