The stairs wind down into the earth nealy 100 feet before emerging from the ceiling of a room.
The scene in the room is a bit startling. First, of all the stairs don't reach the floor. They end (in square 1203) a full 10 feet above the floor of the room. There's no rubble, the stairs are simply gone where you would expect them to continue.
Second, Ruadhnait finds herself facing a wall of violet flame, which, strangely enough, doesn't seem to radiate any heat. The wall of flame extends in a ring around the center of the room, reaching nearly to the ceiling (it's the purple circle on the map).
Finally, in the far corner of the room stands the small man who fled you before, with a crossbow at the ready. He cackles when he sees Ruadhnait and Brand decend out of the ceiling. "Fools! My master is ready for you! You will not interfere!" He then casts a spell, with no visible effects.
There is a large, closed stone door near where the small man stands (squares 1210 and 1310).
Ruadhnait's obvious options are to pass through the wall of flame to square 1203, then jump down 10 feet to the floor of the room. Or she could jump down 15 feet to a square outside the ring of fire.
Brand's options are to jump down 20 feet from where he is, or continue down to 1202, then face the same options as Ruadhnait.
The rest of you are above ceiling of the room, in the "chimney" formed by the stairwell. You'll each have to move some distance down the stairs before reaching where Brand is, seeing the situation, and facing his same options.
The distance each of you must go before reaching Brand's location (square 1302) is as follows:
Esias 5'
Leenah 10'
Oldin 15'
Jiam 20'
Vulan 25'
Aeless 30'
Note: you do not have to pass through the ring of fire to get from 1303 to 1302. It doesn't extend that high. You do have to pass through it in going from 1202 to 1203, should you choose that route.
Good luck! This evil situation brought to you by a special guest, who you may soon meet

Note: if you find the new grid numbering system too confusing, let me know. New mapping program.