In 1906, a groundbreaking Rolls-Royce prototype known as the Gray Ghost vanishes in Manchester, England, and it is only the intervention of American detective Isaac Bell that prevents it from being lost forever. Not even he can save Jonathan Payton, however, the man wrongly blamed for the theft, and more than 100 years later, it is his grandson who turns to Sam and Remi Fargo to help prove his grandfather's innocence. But in this tenth case (after The Romanov Ransom), the car has vanished again, and in it is an object so rare that it has the capacity to change lives. Men with everything to gain and a great deal to lose have a desperate plan to find it, and they won't let anybody get in their way.