From publisher blurb:
With each passing decade, the horrors of the last undead invasion of the Northern Reach fade a bit more. As bizarre as it might seem, there are now those who deny it ever happened at all. The defenders standing guard on the walls of the citadels that overlook the Desolation know better, though, that the quiet enjoyed in recent years hides the inevitable return of the Empire’s greatest enemies.The Empire reels from its own troubles, though. A new invasion could mean the end of everything. Despite the ease with which people shrug off the threat, it remains real enough—and their complacency invites an attack.
The Return of the Witch-King campaign continues with the first of four adventures for expert characters. In Crisis at Vanguard, the group, seasoned from their experiences so far, travel to the Desolation’s edge, where they find the defenders recovering from plague and weakened enough to make the entire line of defense vulnerable to invasion. Worse, the characters might uncover enemies in their midst, enemies who have turned their back on the Empire and welcome the return of the dark times. Can the group unmask the traitors and foil their plots before the invasion begins? Only the most cunning and capable heroes have a chance and even then, it might be too little, too late.