Fiendish things haunt the hive-like alleys and wynds of old Edinburgh. Glasgow's streets whisper with rumours of dark terrors in the shipyard shadows on the snaking, poisonous Clyde. And in the isles, murmurs on fishing boats and ferries speak of far older things, of sites of power and standing stones, awakenings and stirrings in forgotten places. Mysterious, wild, and beautiful, Scotland in the 1920s is home to horrors modern and ancient, man-made and star-born. From the rolling pastoral Lowlands to the snow-capped peaks of the Highlands and seaweed-choked Western Isles, creatures and cultures have taken root in Scotland whose maddening, corrupting influence can be felt far and wide. Something terrifying lurks in the night, casting dark shadows over Scotland. This 288 page supplement for the Call of Cthulhu RPG provides everything you need for a short jaunt to Scotland or an entire Scottish campaign including six sinster adventures and loads of handouts.