When Catharine and Ben go to their French home in Carcassonne, they meet a woman who looks just like Catharine, with whom she shares an instant affinity. Catharine’s spirit guide, Michael, connects her to ancient Carcassonne and the spirit of Elionor, whose thirteenth-century life entwines with Catharine’s modern one. Ben is concerned, but a journey of his own leads him to realise that not only Elionor’s and Catharine’s lives are interlinked, but his own and those of a whole group of people they know in the present world. A terrifying encounter with two false friends from the past – centuries past – and meetings with their age-old selves pull Ben and Catharine into the ancient crusades against the Cathar faith, to unearth a long-hidden secret. Can they defeat the evil twins, Les Deux, rewrite history and save their present, or will history repeat itself, 800 years in the future?