In the city of Sète, in the Hérault, we follow the daily life of several families.
The Delcourt-Bertrand family is composed of Chloé Delcourt, a science teacher and mother of Maxime, Judith and Céleste, she is married to Alex Bertrand.
Maxime is involved in the explosion of the boats which costs the life of Lyès, one of his best friends. Judith has to undergo a kidney transplant after being poisoned during the polluted water scandal. She is with Souleymane Myriel.
Marianne Delcourt is the mother of Chloé and Anna. She is head of the general medicine department at the Saint-Clair hospital.
Anna had a brief affair with Fabrice Vallorta with whom she had a son: Barthélémy.
Thomas is the cousin of Chloé and Anna. He returned to Sète after spending several years in Barcelona where he ran a restaurant.
The Vallorta family is composed of Flore Vallorta, widow of Fabrice Vallorta and the adoptive mother of Bart Vallorta, Anna Delcourt's son. She had an affair with Grégory when he arrived in Sète. Léonard Vallorta runs the family winery and is the mayor of the town until he resigns following the polluted water scandal. Élisabeth is Léonard's wife and the mother of his sons Fabrice and Eddy.
Eddy, Leonard and Elisabeth's youngest son, is psychologically unstable and is responsible for the explosion of the boats that he started.
Shortly after, a mysterious young woman is found unconscious on the seashore,
The Moreno family and the Lazzari family are also at the heart of the intrigues.