From the publishers blurb:
A science-fantasy horror dungeon for Old School versions of Dungeons & Dragons.
What is The Temple of the Blood Moth?
The Temple of the Blood Moth is an OSR dungeon zine full of horrible moth-creatures, a doomsday cult, strange mutants, and rusted, blood-pumping machinery.
The biological life-cycle of the central creature, the Moths, is a framing element of the dungeon itself, inspired by movies like Alien and The Thing. Each subterranean level of the dungeon corresponds to a different life-cycle stage of the Moth.
This dungeon is designed to be directly compatible with OSR systems and easily adapted to 5th Edition and other systems. All monsters include stat-references which can be used to figure out how they work in basically any game with a Monster Manual.
Though Temple of the Blood Moth has some sci-fi elements like mutation, biological horror, and machinery, it can be comfortably incorporated into any D&D-like medieval fantasy setting.