July 2006, the city of Aix-en-Provence is under particular strain. The trial of Mathias Rousseau, the man who called himself the "Zodiac," is about to begin. Called back to France to testify, Esther Delaître moves in with Quentin, the child she adopted, at her brother Jérôme's house on the shores of Lake Geneva in Switzerland. But the disappearance of little Lucie Daguerre thro...