A remote island in the Hebrides, strange wild laughter in the night and an evil Man with a Third Eye are among the weird, frightening mysteries which confront an American lawyer on an innocent business trip to buy an old castle. ...There are indeed a variety of fearful and fearsome men who threaten the American, Hugh Logan, as well as the owners of the Old House, an old woman on her deathbed, and her beautiful young niece who is to inherit the property.