Super Mario Deception/Chapter 2

We stand in a debris-ridden area. It looks like it could have once been a town. "Where are we?" I ask, slowly stuttering on my words.
"I guess you would know this as..." Luigi answers, before stopping to think about my universe.
Universe.
That sounds so weird. I never would have imagined that an alternate universe lay only steps -- or, a portal, I guess -- away from our own.
That's pretty cool.
Luigi snaps his fingers as he gets the name of the town. "...Toad Town."
"To-to-Toad Town?" the words come tumbling out. "Where are the Toads!?" I ask quickly, looking around frantically. I know there are none here, but it never hurt to hope.
Luigi shrugs. "Captured. Hiding." he lowers his gaze. "Dead."
The final word he says -- a word -- makes me freeze, and I clam up. "Wha-what happened?"
"After you, um, died, Bowser quickly stormed the castle. Destroyed Toad Town and the Princess' castle, kidnapped a bunch of the Toad advisers, and returned to the Koopa Kingdom."
Luigi shrugs again. "We don't really know what happened afterwards."
"What about the princess?"
"Now that, I can help you with."
Luigi walks over to a piece of rubble, and moves a large boulder out of the way. He grabs something before moving the rock carefully (why?) back into place. "How 'bout that.They came through." he mumbles under his breath, holding a piece of paper in his hands.
"We got a new base of operations." he smirks, looking at the paper. "Ready to see it?"
I contemplate saying "not really", but I'm curious. "Why not?" I say, looking over his shoulder at the paper.
A map.
"Ready?"
Luigi doesn't wait for an answer, he takes seven steps west, before moving south. He bends down at another (identical) rock, and pulls it back, revealing a small hole in the ground. "Toads. Never could map to save their lives."
I look at the small hole in the ground: about the size of a large pizza. "Down there?" I ask, quietly keeping my voice down.
Luigi smiles at me, and nods, before jumping down the hole. "Mama-mia!" I mutter, before following him.
We land in a large room. I expect to see a sewer system or something, considering the debris from the above world, but we're in a perfectly-clean, metal-panelled room. "Whoa."
Luigi walks over to a panel in the wall, and removes his glove, pressing his index finger against the panel. "Welcome, Luigi." a computerised voice (recorded by Toadette, maybe?)
Still not done...