The beginning - The village elder has a problem
Thorgrim's attempts of prying the trapdoor open with his axe are unsuccessful. The seam, while visible, is too narrow for the blade to sick deep enough to get proper leverage to be applied with force. The axe's blade gives and breaks leaving a small dent on its sharp edge.
Doherti and Logresia search the throne and realize the placement of the ruby stones seems suddenly very, very appropriate. As you fiddle with the one on the right hand side, it suddenly clicks and sinks into the armrest. For few heartbeats nothing else seem to happen. Then there are faint sounds of mechanical gears grinding and speeding up, coming from the throne itself, and the trapdoor sinks a bit and opens downwards and sideways quietly on strong metal hinges. A gust of warm air flow out from the hole. Once the trapdoor is fully open, it stops and the gem in the armrest clicks again and pops up to its natural position. The sounds of the mechanism die out.
Flickering light shines from below through the opening. Rusty metal ladders are bolted on the wall below and they descend some 30 feet straight down into a small 20 x 30 feet chamber. In the chamber below a tired looking young half-elf female looks up to you, her mouth agape in surprise. Her delicate narrow face is dirty and her shoulder long flowy snow white hair is greasy and dusty. Her once better quality travelling clothes are torn and worn. She is unarmed, but has a simple broom in her hands and she seems to have been in the process of swiping the chamber floor. There is a lit oil lantern placed on the floor few feet from her, the source of light for her here.
The room is clean, much cleaner than the chambers you've encountered so far and also much warmer. In the NW corner there's a stack of boxes, crates, saddles, harnesses and filled sacks - looks like trade goods - haphazardly stacked and thrown in there. A simple wooden door, closed, marks an exit towards south in the SE corner.