The rookeries are slums, but an assassination is being planned there and Marcus Kane, Lord Chadwick, will not be able to navigate the labyrinthine underworld alone. His time spying in France is not experience enough; he will require a partner. Fantine Delarive has survived the street for years and knows its every criminal. Though that makes her entirely unsuitable to one of his acquaintance, Miss Fanny fits in everywhere the investigation leadsřeven the crushes of the ton. Like the rookeries, Marcus thought his heart no place for a well-born lady, but Fantine is perfect in both. He vows to end with nothing less than her hand in marriage.