In the quiet Scottish town of Forres, D.I. Fiona MacLeod is called to investigate a chilling murder at the ancient Clootie Well, a place steeped in local legend and folklore. The victim, Douglas Bain, a wealthy businessman with ties to a secretive group known as the Circle of Shadows, is found stabbed to death during a mysterious Halloween night ritual. As Fiona and her young, eager partner, D.S. Duncan Fraser, dig deeper into the case, they uncover a web of financial fraud, fear, and desperation that ultimately led to Bain's tragic death.

With suspects ranging from Bain's corrupt business partner to his fearful girlfriend and the enigmatic members of the Circle of Shadows, Fiona must navigate a complex landscape of hidden motives and dark secrets. As the investigation unfolds, the lines between superstition and reality blur, leaving Fiona to confront not only the crime itself but the unsettling forces that lurk in the shadows of her hometown.

The Clootie Well Mystery is a gripping murder mystery that weaves together Scottish folklore, modern-day crime, and the timeless struggle between light and darkness.