From the front of the book:
Death or freedom? The Vampire Queen has challenged a small band of her worst prisoners to escape from her wicked dungeon lair. With all of your original weapons, magic items and possessions, it is up to you to outwit and fight your way through terrible traps, beastly monsters, and all the horrific surprises she has arranged for you.
From the back of the book:
This module is designed for 8-12 characters of levels 10-14+. The party should consist of at least 3-4 Fighters, 2-3 Clerics and a strong Paladin, 2 Magic Users, and 2 Thieves. Of course feel free to work with the Players to figure out whatever you and your group feels is best.
Quotes from the Vampire Pits:
"Forty-eight Vampires? Forty-eight? The Gods must be crazy! But I will DESTROY every single one of these wicked creatures of the night! I will send every single one of them back to Hell where they belong!" - Paragon the Paladin
"The Vampire Queen needs to be a proper lady and put some some damn clothes on! She is truly a wicked one! Every portrait of her is butt-naked and on display her own dinner ballroom! A disgusting sight to the eyes! Especially while eating at the Dinner of the Damned!" - Windell the Cleric
"Everything was fine up until I fell into that green goo pool where I proceeded to grow three extra mutant arms on my back and two eyeballs on my left foot! Thanks Vampire Queen you bitch! Anyone have a Remove Curse spell?" - Zinthereal the Magic-User