From the publisher's website:
“Den of the Slavetakers” is a short adventure for five 1st level characters that takes place in the Chaos Scar. A slavetaking operation run by a one-armed gnoll turns out to have a truly sinister purpose: victim-gathering for death rituals performed by an underground cult of Torog. The priest of the temple on the far side of the cavern, a female halfling named Morgana, uses a small shard of the meteor to draw mutated homunculus servants out of the valley’s rock. Not content with homunculus servants, she is now using gnoll magic borrowed from her henchman to turn halfling victims into flawed but deadly witherlings. In the mushroom-choked depths of the central chamber, myconids prepare for an assault on the temple to take the meteorite from whoever is left standing after the PCs interrupt the cultists’ rituals.