Juliette has fought to keep her family's oyster business, called La Claire, afloat. She is ready to fight even harder, now that her heritage is threatened. On her Breton island, Juliette has to face developers who want to occupy her production site at any price to build a thalassotherapy center. Despite their tempting offers, Juliette refuses to sell and inevitably attracts the enmity of the industrialists who only think in terms of profitability and easy money. The conflict becomes more and more radical, each side sticks to its position and the confrontation risks going beyond the legal framework.

As a gendarmerie chief warrant officer, Isabelle Florent and her team are faced with the most diverse investigations. As a mother, she tries to protect and educate her son, Nicolas.