From publisher blurb:
"A lost vale located in a high mountain range is home to a clan of mysterious giants. Sages believe the giants have strange powers that no other of their kind possesses. Yet, no one has heard anything from these giants in decades. Do they still dwell in their misty fastness? Do they really possess these reputed powers, and if they do, what are they? Crafty giants, evil gnomes, and a weird guardian await any adventurers who go seeking the lost halls."
“The Misty Halls of Kalávorka” is module of high adventure, exploration, and mystery with a minimal plot that allows it to fit easily into any campaign world. It uses the classic 1st edition fantasy game rules, but can easily be adapted to most fantasy role-playing games including the advanced 2nd edition game, the original game, the B/X or BECMI (“Basic”) games, most old-school renaissance (OSR) role-playing systems, and most other game systems. In this adventure, the player characters will explore a mountain wilderness searching for the halls of a mysterious cloud giant. This includes wilderness and dungeon sections, maps, wandering encounters, and 40 numbered encounter areas. An adventure for characters levels 5-7.