From publisher blurb:
Archmage Stronghold is a Fifth Edition plug-in adventure for four characters with an average party level (APL) of 11, 14, 17, or 20. This document offers details for each level and makes adjustments accordingly.
Plug-in Adventure
As a plug-in adventure, the adventure content serves as plug-in material for game masters who wish to add a small dungeon to a preexisting campaign or need a side quest. If you need a hook for this adventure or already have a similar hook, the Archmage Stronghold Hooks table offers details for introducing this adventure to your players.
Product Description
The following items are included in this product:
Dungeons & Lairs 3: Archmage Stronghold premium color adventure PDF (18 pages!)
12 new monster stat blocks
Full-size map of the Archmage Stronghold by DMDave