Sharing a passionless existence together, Alexander (George Sanders) and Katherine Joyce (Ingrid Bergman), a married English couple, travel to Naples after inheriting a villa. On the verge of divorce, with neither one's disposition warming to the other, they decide to spend the rest of the trip separately. Katherine visits museums and historical sites, whereas Alexander goes to Capri to unwind with drinks. However, during the course of their vacation, the Joyces both undergo changes.