The story revolves around the people of Sète, France. Their lives are punctuated by family rivalries, romance and scenes from daily life, but also by plots involving police investigations, secrets and betrayals.

On the eve of the summer vacations, Marc (16 years old) only dreams of one thing: seduce Sonia. Tonight, he has decided to confess his love for her. But while he performs a balancing act to impress her, he is taken by a dizzy spell and is victim of a fainting spell. He is rushed to the hospital and the doctors discover that he has leukemia. A race against time begins: the disease and Sonia's love become Marc's two challenges.