In the world of upstairs and downstairs Lady's maid Penny Smith is able to work anonymously quietly hiding in the shadows of Lord William Renquist's household. She's seeking out perpetrators of the Devil's Sons and she suspects the man she works for to be a member. But when she meets the infamous Liam she's taken aback by his disarming eyes and feels her resolve begin to waiver. Liam's intrigued by his newest maid. But as much as she invites a deep desire within he knows he must keep his distance. Not only because society says so but because he is the son of a wicked man and the sins of his family need to be repaid. He has made a vow to the Queen to avoid distraction and assist in her mission. But when Penny poses as a lady at Liam's masked ball their chemistry becomes impossible to resist. For one night only they can finally satisfy their forbidden attraction. But they are playing a dangerous game. Because little do they know they're working for the same side. If their secrets are finally confessed will it be their undoing?