From the introduction: The Spirits of Vengeance were a team of benevolent beings who protected mankind during ancient times. They were the vestiges of God’s power bonded to human hosts calling themselves Ghost Riders. There have been different sorts of Spirits of Vengeance around the world based on each country’s customs, belief and religion. Keeping them in charge was the archangel Zadkiel, whose sole purpose was to manipulate the Spirit’s true place of origin.