A Man in Love paints an evocative picture of temptation and lust as seen through the eyes of an American working in Italy. The man, a famous American actor, Steve Eliott (Peter Coyote) meets a beautiful British actress by the name of Jane Steiner (Greta Scacchi). He is indifferent to her at first, refusing to acknowledge both her and her father, Michael Pozner (Peter Riegert). Jane is angered by this, especially Steve's refusal to let her father interview him. They share a few choice words with one another and leave the set. Alone, Steve begins to realize a quickly growing feeling of affection towards Jane. He professes this feeling when they next meet and the two share a night of hot passion. Steve feels fulfilled, but soon becomes consumed with guilt. He has loyal wife wating at home and this new romance is threatening to turn into something much more than a one night stand.