From the publishers blurb:
Brave the Bone-Strewn Halls of the Riven Catacombs
The Dungeon Domains line inexorably marches onward, with our fourth entry leading your characters deep into the shadow-shrouded depths of the Riven Catacombs!
Centuries ago, the Red Death cast its shadow across the realm. A demonic plague of gargantuan proportions, it felled nearly one-third of the population. Desperate survivors nailed the crimson corpses into hastily constructed caskets and sealed them inside a hidden catacomb within the Complex. Some accused the plague doctors of being overzealous, burying the living along with the dead…
What are Dungeon Domains?
Dungeon Domains are hand-drawn geomorphs representing sections of dungeons, caverns, sewers, or catacombs, fleshed out with flavourful and detailed descriptions of each area as well as a unique legend explaining the dungeon’s history, all to provide GMs with inspiration to create their own dungeon-delving adventures using any system or setting of their choice.
Every Dungeon Domain has been designed to connect seamlessly with any of its sister products, allowing GMs to construct or expand dungeons of any size with minimal effort.