After scientist Dr. Rishikesh Singh and his wife survive a plane crash in India and the doctor becomes a recluse, intelligence officials suspect the doctor is mentally incompetent or a doppelgänger – a double – has taken his place. Parker Glynn is called in to solve the mystery, an adventure that leads from the Waldorf Astoria in West Palm Beach to the deserts of Nevada and the wine country of Napa Valley, where he finds a tortured adversary and a sinister al–Qaeda plot that will affect every American…and the world.