On the picturesque streets of Milan, where you can easily get lost in the maze of houses, restaurants and feelings, the action of Marco Missiroli's novel “Fidelity” takes place. Carlo loves his wife very much. But his student Sofia has touching dimples on her cheeks, and Carlo cannot stop thinking about her. Margherita loves her husband very much. But her physiotherapist Andrea has such strong hands, and Margherita cannot stop thinking about him. Through lust, confessions, fears and betrayals, they try to forge a life that sometimes seems meaningless, difficult and frightening. What does each of them really want? And will they be able to remain true to themselves?