The Ingrid Pit

From the introduction:

The Ingrid Pit, home to innumerable bats, has sat just outside the hamlet far longer than anybody can remember - it was probably there long before the hamlet was founded. A place like the pit will produce rumors that it contains untold treasures and only a few months ago, group of adventurers showed up to find it. They came out of the pit again, but ever since I then something has haunted the area, with livestock I and people, in particular young, healthy men, I wasting away almost over night. Obviously, that last I group of adventurers disturbed something in there...