Shadows Loom is the first in a series of linked adventures designed specifically for higher-level parties. In Shadows Loom the player characters travel to the Cartel trading post, Midway, to learn more of a desperate mission to save the inhabitants of the Forbidden Lands from the legendary scourge of the "Doomriders", one of the Twisted Earth's most notorious raider gangs. From Midway the party travels north to investigate the ruins of Barter Town, and learns just what this gang has in store for the rest of the world.