A British author travels to Tuscany to promote his latest book, which argues that copies of artworks can be just as valuable as the originals. At the book signing, he meets a French antiques dealer who offers to show him around the local countryside. As they spend the day together, their conversations explore the nature of authenticity, art, and their personal lives. The woman's enthusiasm for his work contrasts sharply with his detached demeanor, setting up a dynamic that shifts as they visit local landmarks and discuss philosophical ideas about originality and imitation.

During their journey, they are mistaken for a married couple by various locals, an assumption neither immediately corrects. This leads to increasingly intimate and complex interactions that blur the line between reality and performance. Their dialogues become more personal and emotionally charged, revealing deeper layers of their personas and relationship history. As the day progresses, it becomes evident that their encounter is more than just a meeting of minds, pushing them to confront their own notions of love, commitment, and identity against the backdrop of picturesque Italian landscapes.