The town of Winterhaven stands watch over a ruined keep overlooking 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! Keep on the Shadowfell is an introductory 4th Edition Dungeons & Dragons adventure for characters of levels 1-3.