"Upon a rocky cliff overlooking the foreboding valley of the Red Tusk Orc tribe sits the ruins of Nightstone Keep. Within its walls hides a small library, once protected by the soldiers who made the keep their home. Tucked away somewhere in this library, covered in dust and forgotten to time, is a book of dark and ancient magics known as the Codex of Xuprix."
The Ruins of Nightstone Keep is a Third Level adventure for three to five players written for Dungeons & Dragons 5th Edition. The adventure begins in the town of Elder Crossing and from there carries on to the nearby ruins of a once-mighty fortress known as Nightstone Keep, and the dark caves that lay below it. Members of a shadowy cult led by a man named Sanzir have come to Elder Crossing asking questions about the keep and a tome of magic that was rumored to be hidden there. Can the adventurers keep the tome from the hands of Sanzir before he finds it and uses it to open a portal to the Shadowfell, unleashing its horrors on the small town?
- from the publisher's blurb