International conman and expert thief Nick Fox has been kidnapped from right under his FBI handler's nose. Fortunately for him, he's been taken by a gang of thieves who want his expertise. Unfortunately for the thieves, his FBI handler is Kate O'Hare, and there's more than a professional connection between her and Nick.

A diamond vault is the first target, but soon Nick and Kate have both joined the gang and are chasing around the Paris sewers in an attempt to prevent a biological weapon being unleashed. All that stands between them and a global terror event are Kate's formidable weapons skills and Nick's well-honed charms...