Originally Posted by Chief_Jericho
Originally Posted by Passerby
The key to the locked door should be on the priestess' body.

Edit: Or on the table in her room.

Yeah that's the problem, it's not. I don't suppose there are any alternative ways in are there?

Just in case you haven't discovered this ... you can press Alt key to highlight interactable items around you, just to be sure the key is really not on the table. If it's not on the table, then it has to be on Priestess Gut's corpse. I've never found myself locked out of that room.