Countess Tanya Vronsky acts as bait for notorious jewel thief Andre Desormeaux and his assistant, Polo, on their tour through Europe. Everything goes according to plan until Tanya falls in love with their next target, Paul Vernay. Still, the gang manages to victimize Paul. After the heist, Tanya announces that she is retiring and goes on to marry Paul. Desormeaux tries to convince her to change her mind, but in vain.