You open the door, seeing an ordinary-looking kitchen with no one in it, and a closed door opposite a stove. You walk inside, and the door closes and locks on its own.

The kitchen is unnaturally bright, with a large pot boiling on a stove behind you, a few knives on a bloodied cutting board, and an assortment of closed cupboards. You try opening a small dumbwaiter hatch with no luck, and turn around to face the new door.

You can:
see what's in the pot,
examine the knives,
look in the cupboards,
try operating the stove.

You could also ignore what's in this room and
open the door opposite the stove.