Princes of the Apocalypse

PRIMORDIAL EVIL THREATENS THE REALMS
The first signs are always small: bandits on the roads, pirates on the Dessarin River, monster sightings throughout the Sumber Hills—all too close to the lands of civilized folk.
To top things off, a delegation from the dwarven city of Mirabar has gone missing. Are these events all some bizarre coincidence, or is there a deeper reason behind them?
Working through its prophets, the Elder Elemental Eye has emerged to spread chaos across the Forgotten Realms. How will the adventurers prevent absolute devastation?