François Sentinelle has two lives. By day, he is the most famous cop of Réunion Island, known for his tough methods and flowery shirts, pursuing criminals in his famous yellow defender. But the rest of the time, Sentinelle is also a charming singer.

After her sudden departure from Reunion Island as a teenager, Inaya never thought she would return. But when her older brother, Ethan, asks her to come back to sing at his daughter's christening, she thinks it's finally an opportunity to exorcise the old demons that haunt the family. That was without counting on Mathis, her little brother, who never accepted her departure and who has always refused to face up to the secret behind their separation...