Informed by his sister Oriana that their father is seriously ill, Roman bank manager Guido leaves his wife Elisa with their son and takes off in his car for their hometown, Rosignano Solvay. Wanting sweet company on his journey, he visits Jennifer, his mistress whom he hasn't seen in months. Her clear refusal to follow him pushes him to take Anita Watson, a 26-year-old American who has come to Rome to find an Italian architect she met in Chicago. After a stop in Orbetello, the two bond more and make a detour to the deserted Isola del Giglio.