The Valley Barrier Part 1: Shadow Over Apex

From publisher blurb:

This is part one of a new massive 2-part adventure for the Eldritch RPG! A powerful curse is cast over the Valley of Aesir, preventing anybody from passing an invisible, magical interdiction to travel. The Heroes must find out why the valley and City of Apex is magically sealed off from the rest of the world, and who is responsible. This adventure pits the characters against an intricate web of deceit, a maze of personality that they must unravel, or cut through forcefully if they would hope to survive. It is appropriate for a strong, experienced hero as well as the thoughtful and careful neophyte, provided each watch his step.