Is it right to love two men at once? Is it right to marry them both? A loving mother to 8-year-old Jack and wife to Martin, Diane Sullivan works on a busy Stansted-Bologna airline route. Her time is divided between home and Italy but no-one's complaining. It seems a happy, hard working life. But then she starts an affair with one of her passengers, Mark Landucci, an Italian architect. The first lie she tells is that she's single. As the affair intensifies, Mark proposes to her.