We're going to pick up where we left off last time, where the 4th-level PCs are chasing after a necromancer and figured out the command phrase to follow him through a teleportation circle network. Now they're in an unknown city and the magic book that will allow them to teleport back to the city they came from has been taken from its niche, so they'll not only have to find the necromancer but also the book with the key on how to get back.
And to make matters worse, this city they teleported to was infused with necromantic energy years ago, such that pretty much everyone who lived there has been slain and reanimated as undead. The PCs will be fighting their way through hordes of random skeletons, zombies, and the occasional shadow...it's going to pretty much be a D&D session of "The Walking Dead." (Good thing two of the PCs have cleric levels!) And this would have been thematically appropriate for the Halloween season, but scheduling conflicts are going to postpone this game session until 13 November.*
On the plus side, after they complete this adventure they'll all be leveling up to 5th level, so I'll be building upgrade checklists for the players as well.
Johnathan
*Edit: Looks like the game's being bumped yet another week. Fingers crossed for 20 November.