The young Marquis of Vidal, a notorious duelist and gamester, has earned the nickname 'Devil's Cub' due to the wild excesses reminiscent of his father, the Duke of Avon.

When Mary Challoner discovers Dominic's plans to run away with her lovely sister, she bravely dons a cloak and mask to impersonate her sister. This daring act leads her to France, accompanied by the most notorious rake in Georgian London.

Join the adventure with familiar characters from These Old Shades in this captivating tale of mistaken identities and unexpected romance.