Viscount Markham has one rule - never bed the same woman twice. But all rules are made to be broken. When Grace Denton decides to visit her sister in London, she is shocked to find the paid companion has a new profession and now earns her living as a courtesan. But when her sibling disappears after an evening out, Grace is forced to masquerade as the much sought after paramour in a bid to solve the mystery. Using information from her sister's secret diary, Grace begins her search with the arrogant Lord Markham, convinced he was the last person to see her sister alive. After being bitten by the golden-haired devil in Bavaria, Elliot Markham has learned how to navigate the world of the ton whilst hiding his terrifying affliction. But when a masked lady accosts him at a ball, posing as the famed courtesan Caroline Rosemond, he is desperate to discover more about the intriguing beauty.