From the publisher's website:

The hardy citizens of Chalcis have weathered the yoke of the Anari Empire, withstood the terror of the Liche-Priest, and held strong in the Blizzard War, but now their realm is facing threats that cannot be so easily defeated. The metallic race known as the Scavengers plague the rich mines, while the borders of Witchwood encroach deeper into Chalcis each year, bringing with them hard winters.

This supplement delves deep into the realm of Chalcis, exploring it in greater detail. New locales and NPCs provide adventure seeds for the GM, while for players there is the cult of Eira and its major festivals. Two new minor deities, the god of the Scavengers, a new species of fey, and an NPC archetype round out the information.