From the publishers website:
The second in a series of supplemental material for STONEHELL DUNGEON, this twenty-page PDF is an anthology of three adventuring sites located in and around the ancient prison suitable for exploration by low-level characters. Included are “Modnar’s Cellar,” the undercroft of a ruined tower owned by a magic-user with a strange agenda, “The Nest of Otrogg,” a cave system once occupied by a loathsome cult, and “The Sanctuary of Chthonia,” a secret sub-level located inside Stonehell Dungeon and overseen by an undead witch. It also introduces two new spells, eight new monsters, two new magical items, and a pair of minor deities for your Labyrinth Lord™ game. This supplement contains three maps but no other interior illustrations.