A 1920s scenario for Call of Cthulhu. Contains maps, pre-generated characters and an advert for 25mm Call of Cthulhu figures.
From the back cover:
"The disappearance of a young girl leads a group of investigators to a small island off the coast of Maine. The people who live there seem so strange and secretive. Why do they hate 'outsiders'? What could they be hiding? The investigators will soon come face to face with the Horrible Secret of Monhegan Island!