The impoverished Margaret Lambart is suddenly flung into all the glitter of the Season in Regency London. Suspected by her godmother's nephew, the influential Marquis St. George, of being merely a common adventuress, she has, nevertheless, a brilliant success, and attracts the attentions of the young Duke of Oxford. However, when the Marquis discovers that Margaret is far from wanting a husband he finds he has to revise his estimate of her true worth.