In 16th century France, a land torn by war between the Catholics and Huguenots, 19-year-old Minou Joubert receives an anonymous letter at her father's bookshop. Sealed with a distinctive family crest, it contains just five words: "She knows that you live." Before Minou can decipher the message, she meets a young Huguenot convert, Piet Reydon, who has a dangerous task. He will need her help if he is to stay alive, in this debut novel in Kate Mosse's new series. The two soon find themselves trapped in Toulouse, facing new dangers as the religious divide deepens and tensions ignite across the city—and a feud that will burn across generations begins to blaze.