Case 137 is seemingly just another case for Stéphanie, an investigator at the IGPN, the police of the police. But an unexpected element will trouble Stéphanie and transform case 137 into something more than a simple number.
Chiara is an actress and daughter of Marcello Mastroianni and Catherine Deneuve. One summer, she decides to live like her father. She dresses, speaks, and breathes like him with such conviction that others start calling her "Marcello".