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".
Jacques is a 35-year-old writer from Paris. Arthur is a young student in Rennes. They instantly fall in love. But they'll have to face sickness to keep it that way.