From the publishers blurb:
The Wizard Has Disappeared
This dungeon-crawl adventure is suited for 4-5 players of around level 6, but may be easily scaled to fit players of higher or lower level. It may also be used in either a 5e or OSR style game. (See 5e/OSR/scaling guidance on the last page.)
JUST DROP IN
This dungeon can be added to any adventure or campaign. Perhaps it’s an addition to an existing dungeon (“You find an unexpected passage…”), as a quest the party is hired to conduct (“The local ruler has a problem…”), or as a random find while hex-crawling (“You find a pile of rubble near the cliffs, and what looks like a staircase…”). Use the rumor hooks below or create your own to make the exploration enticing.
RUMORS SWIRL
There used to be a wizards tower here, but an earthquake changed that. The tower fell, and no one ever heard from the old wizard again. Some say he was responsible for the quake. Some say he left powerful magic behind. Some say he was conducting terrible experiments. Some say all of the rumors are true.