The Beau Monde calls her Naughty Lady Ness, and with good reason. However, her family’s standing and her minor infractions are looked on with affection. Until she goes too far. Thus, she is banished to the wilds of Cornwall with her brother and cousin in attendance. Like a magnet, trouble follows when she is drawn to the portrait of a man at the heart of a scandal. He is known as the Devil of Montlaine, accused of witchcraft and murder. But these were things that cannot deter, Naughty Lady Ness!

Lord Severn was in today's terms—hot! In the regency era, he was a rogue, and very devastatingly so, but Mary wasn’t interested in him at all. She had been infatuated with Richard of Grey since their adventures with her brother, when they met at Montlaine in Cornwall. Richard, however, believed he was in love with another and seemed to think of Mary as a sister. Mary decided to ask Severn, who was such a good friend of her brother, to help her in a plan to win Richard's heart. Things got complicated. So it began, this merry-go-round tale of love, villainy, adventure and romance. Come meet the Devil of Montlaine’s sister, all grown up in Mary of Montlaine!