Griffin left the Pinkertons after the death of his partner. Now in business for himself, he must investigate the murder of a wealthy young man. His only clue: an encrypted book that once belonged to the victim.
As the investigation draws them closer, Griffin’s rakish charm threatens to shatter Whyborne’s iron control. But when they uncover evidence of a powerful cult determined to rule the world, Whyborne must choose: to remain safely alone, or to risk everything for the man he loves.