A manky old belt made of fur can change a person into a werewolf.
We never really find out how or why except the belt was made in the 1400's? by a magician or alchemist.
The story takes us from Glasgow, Scotland to a remote ranch in Novia Scotia.
Not too heavy, though the main character tries too hard to sound like one the famous detectives from the old black and white movies and dime store stories, like from the Maltese Falcon. He doesn't quite pull it off.