The Frost Lords Keep

Publisher's blurb: A four-hour adventure for a party of four or more adventurers from 8th-10th level. What seemed like a simple job - get the merchants from Baldurs Gate to Icewind Dale, turns into a desperate journey across the Spine of the World and into a long-forgotten fortress in hopes of escaping the deadly storm. However, what our intrepid adventurers find within, is a long forgotten horror and quite possibly their most dangerous foe yet. Can you weather the storm and survive a journey through the Frost Lords Keep?