Sent by Graf Boris of Middenheim to "help" the Tsar, the adventurers will find themselves contending not only with undead and beastmen but also ghosts, elite hobgoblin warriors, creatures of chaos and strange nature-spirits - plus the Kislevites, who can be less than friendly.

Something Rotten in Kislev continueed The Enemy Within campaign, but contained possibilities for being played as a stand-alone campaign, and could be skipped without problems.