A dead woman loved by all.Instead of spending a pleasant day with Leon on the coast and at Le Mont-Saint-Michel, Sandrine Perrot is called to a fatal accident in the Saint-Malo marina. The driver's death touches her personally, as she had just met the woman. In the course of the forensic investigation, she discovers that there is more to the alleged accident than she first suspected.Her investigation leads her into the world of a well-known family in Le Mont-Saint-Michel, a family marked by antiquated traditions but also by conflicts between siblings.Another person soon disappears without a trace. Was he trying to evade interrogation, or was an unwelcome witness being silenced?