Following the trail of one of the first Pathfinders, the PCs travel to the town of Sauerton where an old ally helps them find important clues. These clues lead the PCs into a dangerous wilderness to an old tower whose history goes back even farther than the Pathfinder Society itself. As the PCs navigate numerous threats with opposing interests, will they find the hidden keys to unlock the secrets of the Open Road Pact, or just another trail obscured by the passage of centuries?