The gripping new action thriller from New York Times bestselling author & former FBI agent Noah Boyd. Steve Vail has brains brawn & balls -- & is back for his latest mission. Steve Vail visits Kate Bannon Assistant Director of the FBI for a well-earned & romantic New Years Eve in Washington DC but he suddenly finds himself knee-deep in a very complicated & unusual case. A man known simply as Calculus an intelligence officer at the Russian embassy approaches the FBI claiming he knows of several Americans who are supplying confidential government information to the Russian secret service. In exchange for this list he asks for $250 000 for each traitor the FBI arrests. But when Calculus is suddenly recalled to Moscow the Bureau suspects the worst. The Russians have probably captured Calculus & might have access to his list -- which means theyll soon track down the informants & murder them. That is unless the FBI can find them first but without knowing exactly who is on the list they must keep the operation quiet. Once again Vail is their man. Hes the ideal candidate for this kind of stealth recon mission. It soon becomes clear that finding Calculus & his list of traitors isnt going to be quick or quiet. In fact its going to be downright deadly!