It is an especially proud moment for them when they discover that one of the top art thieves in the world is behind it. But then, the whole thing takes a very strange turn when the pilfered painting in question turns out to be a worthless family heirloom that no one wants. Who would risk jail, and even life and limb, to take part in such a dangerous venture?
MacBridan, and his associate Cori, are assigned to accompany and protect the collection on its trip across the sea and deliver it back to the MacKinnon ancestral estate. This seemingly innocuous and otherwise innocent task quickly turns violent, and the body count starts to rise. They soon discover that an ancient and malignant evil has been awaiting them in the Scottish highlands, an evil that has haunted the MacKinnon clan for generations.
MacBridan’s return in Relic of Darkness pits him against an adversary as old as it is deadly. Unsure of who can be trusted, MacBridan and Cori struggle to fight a mysterious enemy they do not understand in a place where superstition trumps reality. As the evil surrounding them grows more intense, they find themselves in a race against the forces of darkness where second place is rewarded with death and spiritual damnation.