Adele Russell was once a wealthy heiress, happily engaged to David, the Earl of Blaisdon, but when her father was ruined, she lost everything, including David. Now, working as a shop assistant in fashionable Milsom Street, she is shunned and scorned by the society that once embraced her. But when she finds an invitation to a forthcoming masked ball, Adele is tempted by the lures of her past once more. Both David and a mysterious Sir Mask attend the ball and Sir Mask is intent upon seducing her.