Allegra Sheridan is a jewellery designer in Manhattan. Though far from rich and famous, the young gemologist has made a name for herself designing one-of-a-kind pieces for a small but elite clientele - one of whom has offered Allegra an extraordinary opportunity. Wealthy software entrepreneur Hilton Whitehead has a mistress he's eager to please. What Kitty wants, Kitty gets. And this time, Kitty wants the legendary Princess Karima emeralds coming up for auction in Europe. Whitehead's proposition: he'll pay Allegra a small fortune to travel to Paris and bid in anonymity for him.