In the rural Menador Mountains of southern Nidal, the PCs find themselves in a fog-enshrouded mining town facing a terrible fate. Silver Tarn, on the banks of which the settlement of Stom's Claim stands, has grown a mind of its own. Reaching out with strange abominations of the deep to siphon the souls of the stubborn populace, the lake hopes to release a powerful fiend bound centuries earlier by Arodenite clerics. If the PCs can't stop the Silver Tarn Entity, Stom's Claim and much of western Avistan may soon fall to a fate beyond comprehension.