As one of the famous Preece sisters, Kitty is the most sought-after courtesan in London. But with the vicious Duke of Gillingham scaring away any man who looks her way, securing a new arrangement with a wealthy gentleman will be no easy feat. Kitty's only hope to find someone suitable is through her loyal and cherished friend, the Reverend Sidney Wakefield.

Sidney has devoted his life to the church, but it was never by choice. He is a writer and Kitty his muse. As he is roped into Kitty's plotting, he begins to realise that protecting her from the malevolent Duke comes at a price - and it might mean losing Kitty to someone else entirely.

As Kitty and Sidney try to find a way out, it becomes clear that years of friendship have developed into something deeper. Except that they are from different worlds and Kitty's heart has never been hers to give away...