FBI Special Agent Zane Rigby, in the Office for Cases of Historical Significance, is called upon to find the answer to a more than seventy-five-year-old question. In 1935, did Franklin D. Roosevelt travel to Cocos Island off Costa Rica to go fishing or to search for the treasure of the Bloody Sword? Zane goes straight to the source of the controversy, political commentator, Paul Mallory, to force him to come clean. But when he arrives one problem stands in his way: Paul Mallory has been murdered Rigby soon finds himself in the midst of personal, political, and criminal troubles. A beautiful British treasure hunter vies for his affections; the Speaker of the House's agenda to end polarization in Washington is put in jeopardy; and Rigby's nemesis, the Monument Bomber, is determined to blow up Mount Rushmore. Each complicate and confuse Rigby at every twist and turn. All seems lost as Rigby is suspected of murder, while an assassin has him clearly in his sites and is ready to pull the trigger. Rigby must unravel the secret of the Bloody Sword or face his own bloody end.