Though Emily (Diane Keaton) and Donald (Brendan Gleeson) live in the same idyllic London neighborhood of Hampstead, the worlds they inhabit could not be more different. She is an American widow occupying a posh apartment she can no longer afford and filling her time with charity work. He is a gruff Irish loner who lives off the land in a makeshift cabin. When his home is threatened by real estate developers, Emily believes she has found her new cause—but gets more than she bargained for when unexpected romance blossoms. Based on a true story.