Labyrinth, probably. Although Den of Evil has a nice ring to it.
“What are we looking for?” Eric whispers.
“I don't know,” I whisper back.
“You don't know? I thought you had a plan!”
“Yeah, a plan we came up with together, as I recall,” I say, before checking around a corner.
“Sure, release the captives and capture the captors,” Eric says.
“In whatever order it happens in,” I agree.
“Sure. But what are we looking for?”
“What, are you expecting signs that say 'This Way to the Evil Lair'?”
“It would be nice.”
Eric and I look at each other, just to make sure it wasn't us. It wasn't.
“Who is that?” the voice asks.
I look to my left and down, and jump backwards. Just a tiny bit. Because I just noticed that the doors on this hallway have holes in them partway down, with a little shelf, like in some prisons. I notice this because someone is looking out of one of those door-holes. Looking at us. Not hopefully. More afraid to hope.
“We're here to help,” I say.
“Hi,” Eric says brightly. “Could you direct us to the secret lair?”