The novel follows a woman, Modesta, who is born on 1 January 1900 and her experiences though her life in the twentieth century. The text is written for the most part in the first person (by Modesta), but sometimes also in the third person, especially in the first part of the novel.
Astrid and Rapha?lle are back for a new round of investigations that will see them team up with the secret services, pursue a professional killer, rub shoulders with Mormons, the horse racing world, the last descendant of an Aztec tribe, a Buddhist temple, a film set and even confront a criminal who dangerously transforms under the full moon...