The noise came again, like metal shifting, and I almost jumped out of my skin. I looked at Derek, and he had the same shocked look, but then I noticed something… his hand was by the wall.

“Wait… was that you? You make that sound right?” I asked, my voice shaky.

He gave me this sheepish smile and pressed his palm flat again. Suddenly the wall slid open with a hiss. Behind it was another door, and the air that rushed out was freezing cold.

I hugged myself immediately. “What the hell, ...