A One-Round Living Greyhawk Highfolk Regional Adventure
From the introduction:
The startling discovery made in the hills of the Sepia Uplands leads you back to Highfolk. There, you hope to receive counsel from concerned parties as to your next step along the path of hope.
Part 2 of Three Furies, and Part 4 of Blood on the Trees.
An adventure recommended for characters levels 5-13.