When career thief Gaston Monescu (Herbert Marshall) meets glamorous pickpocket Lily (Miriam Hopkins), their love soon takes on a professional dimension as they initiate a plot to rob beautiful perfume magnate Mariette Colet (Kay Francis). But as Gaston gets ever closer to his intended prey, his romantic confusion, as well as the threat that his past will catch up with him, throws their plan into jeopardy.