Delphine is the author of an autobiographical novel that has become a bestseller. Exhausted by the promotional tour, just when she feels out of place, paralyzed by the idea of having to start writing again, she meets Elle, a young, attractive, intelligent, intuitive woman who seems to understand her better than anyone.

An international search for a rare copy of a book brings an unscrupulous book dealer deep into a world of murder, double-dealing and Satanic worship.