Embla, I presume you are using some kind of light source, beyond the open hole above you. For now, that hole will dimly light the environment you're in; forgive me for moving you five feet from the bottom of the 20 foot slope, but where you are you're safe; and you'll need to make room for Engelhart when you give the signal.
[if this is too dim, I'll brighten the picture]
You can see that they've collected 8 barrels of something from the outside world. There is human blood on some of the barrels, dried; two of the barrels are sitting on a bench, which is slightly bowed from the weight ~ so without touching them, you can see those barrels are full. The room is made of stone that has been mined out; except the furthest edge of 0405, which has a line of wooden posts, about four inches thick, forming a wall from floor to ceiling. They're ten feet away at the moment, and you haven't named a light source, so you can't see how they're fixed in place, but there seems to be no door.
Nor can you see clearly into the cubbyhole with six barrels in it. Not until you approach it with a light source. Being around the corner, half that corner is in very dim shadow.
Your heightened sense of smell suggests that there is some form of fermented drink in the barrels, but it smells . . . off. Like they've done something to beer.