From the back of the book:
Merciless Foes and Unforgiving Lands
On a trade road to the city-state of Tyr, a caravan is assaulted by a deadly obsidian shardstorm, forcing the survivors to band together and navigate the wastes to safety. But the force of nature that destroyed the caravan is under the malevolent control of the being known as the Wastewalker, who will stop at nothing to see the end of those that escaped his initial wrath. Can the heroes reach the Ringing Mountains before it's too late?
DARK SUN: Fury of the Wastewalker (Chapter 1) is designed for five characters of 1st level and is the summer 2010 season of the D&D Encounters official play program. This DUNGEONS & DRAGONS adventure includes a full-color battle map, ready-to-play encounters, and DM information on the D&D Encounters official play program.