The Byzantine Fire is much more than a flawless ninety-carat ruby. As a stone, it's worth over a million dollars, a value vastly increased by its pure gold band - but its history is what makes it priceless. A ring that has been fought for with sword and pen and passed from nation to nation by all manner of theft and trickery, has finally made its way to the United States. The US agrees to return it to Turkey, but it's about to be stolen twice more.
A gang of Greeks armed with Sten guns burst into the security room at JFK Airport and escape with the priceless stone, which they deposit in the safe at a small jeweler's shop in Queens. A few hours later, unlucky thief John Dortmunder, expecting a routine robbery, steals it again. Having unsuspectingly lifted the hottest gem in town, John Dortmunder becomes the prey of the FBI, the New York City police, terrorist groups from three nations, and all of New York's petty and not-so-petty crooks.
Much blood has been shed for this little ruby, and Dortmunder's could very well be next.