You open your eyes within a hallway, the lights slowly brightening, letting you see the ornate tapestries strewn reverentially from the two walls on either side of you. As your eyes adjust, the hallway finally becomes lit to optimal; as you glance around, the door five meters in front of you clicks once, then twice. As the double blast doors open, one vertically, the other horizontally, the door itself finally hisses softly open.
Inside the newly revealed chamber beyond the door, awaits a large and intricately carved wooden table of unknown make; seated behind the desk, placing a dataslate to her right, your left, the female Inquisitor Janica Tyrantbreaker gestures for you to enter her chamber.
After moving the Astartes frame that is yourself into said chamber, the door hisses softly closed behind you; the blast doors sound like they just sealed you in, too. A standard looking briefing room, a cursory glance reveals; after returning your gaze to the Inquisitor, she motions for you to take a seat in the armaplas chair specifically made so that an Astartes may sit, even in Power Armor.
"Thank you for coming; I'm sorry about the way you were ... deposited, before my chambers. It had to be done. This is a very secret mission, and a very importantly short amount of time we may have to work within, to accomplish what we need to do. I assume you have questions; so, to ease your curious mind, I can only say this: if you take on this Mission, Space Marine, you will be on a task that I do not even know how to help you broach the subject with your fellow Astartes."
This is the speech each of you heard before the Inquisitor slid you the dataslate; it sounds important. It feels important; are you up to the task? The only way to find out is to read the dataslate and face a possible mind-wipe of what you read if you choose to not take this mission. Will your honor and oath to duty allow, or prevent, your decision?
"Tell me, Astartes: how do you feel about restoring the Imperium's technological might, it's ability to make the sacred war machines of the Adeptus Astartes, and to restore the glory that is Mankind's to its rightful place, upon the Crown of He Who Sits Upon The Throne?"
She then hands you a dataslate...