Annabelle Flynn is the sister of London’s two biggest libertines, and her reaction has been to become the picture of purity. But the sensual nature of her family has not been lost on her and she is troubled by urges she dare not follow. She ignores the demands of her body and instead throws herself into two different activities. One is pursuing a proper marriage in Society that will settle her once and for all. The other is trying to save her broken brother by following him into the shocking Donville Masquerade, part of a hell run by the mysterious scoundrel, Marcus Rivers. By day, Annabelle pursues ladylike endeavors and seeks a staid husband to combat the wild reputations of her brothers. By night, she inserts herself into Marcus’s business… and eventually she finds herself seduced into his bed.

Marcus cannot deny that he has always wanted Annabelle, and the idea of her running around his club is maddening on too many levels. He wants to help her, and the fact that he can be her lover is just a bonus. But what she’s doing is dangerous and at some point he knows he’ll have to let her go…if he can.

Can a not-quite-proper lady and an entirely unsuitable cad find anything in common outside of the bedroom? And will Annabelle be willing to trade passion for cold, calculated ‘perfection’?