Mary Challoner must protect her sister at all costs.

When she discovers that the notorious Marquis of Vidal is planning to run away with her little sister, Mary will not stand idly by.

To save Sophia's reputation without destroying her own, Mary will take her sister's place – and once the Marquis sees through her disguise, he will be humiliated and forced to return her home. But the irresistible Marquis is a wilder rake than even Mary anticipated, and her growing feelings for him are proving an unexpected complication. . .