During the annual party in the château of a wealthy French family, a murder is committed. The small neighboring town is thrown into disorder, suddenly plunged back into the old relationship of master and serfs.

Candice Renoir had put her career on standby for 10 years. When she returns from Singapore to resume service in a port town in the south of France, she feels a bit “rusty”. Despite the obvious defiance of her unit and a cynical superior who doesn’t make her job any easier, she is determined to turn her so-called weaknesses into strengths, solving the most complex cases with her common sense, her acute observation and her practical nature seasoned by a busy daily routine. Only Candice can catch a killer because she knows the chemical composition of a window-cleaning product or determine the hour of a murder from the cooking-time of kebabs… Candice is only naive on the outside, and nobody can resist her!

The daily lives of the inhabitants of "le Mistral", an imaginary neighbourhood in the Mediterranean port city of Marseille, where wealthy families cross paths with the less than rich.