KEEP ON THE SHADOW FELL
The town of Winterhaven stands watch over a ruined keep that was once a bastion of good in the realm. This keep overlooks the Shadow Rift, a dark scar in the world that was once a gateway to the Shadowfell but has been dormant for many years. Now, an evil cleric of Orcus, Demon Lord of the Undead, seeks to re-open the gate, and the only thing standing in his way is a small yet determined band of heroes. This is a ready to play adventure. All you need is a group of adventurers numbering between 4-6, and a set of dice or two as well as the 4.0 core rule books: The Monster Manual, The Dungeon Master's Guide, and the Player's Handbook. Dungeons and Dragons: Keep on the Shadowfell is ideal for characters of 1st - 3rd level.
This adventure is by Bruce R. Cordell and Mike Mearls.