The boss of a Cap d'Agde nightclub is found murdered in her own office. Elisabeth Richard and Charles Jouanic get back together to investigate what looks like a crime with an obvious motive, since the safe has been emptied of its money.
In Saint-Affrique, Aveyron, big-shot farmer Pierre Loiseau is found murdered.
助理檢察官伊麗莎白和警官保羅攜手合作，調查男子身著潛水服陳屍於沙灘上的案件，同時又發生外遇情殺仇殺案，調查陷入膠著
