The design language established by Into The Fog is clear here and I think you also improve on it. This might be the most complete and useable entry I've read so far in that the set up, motivation, and core premise are all clear, concise and provided on page 1. The central tension of Lady Fan and her child circle the loop and from there we have an internally consistent situation! Super nicely done.
The "What Needs Doing" bit of this might be my favorite part. Motivation to help these villagers, hang out, and learn their plight is great and because of the core threat there's some stakes to player's actions.
Great ideas on the game design front such as the reading of dark tomes, although I might make the cost even more punitive ( maybe I'm mean).