Brothers Owein and Selwyn live in a small Welsh mining village in the early 1980s. Owein falls in love with the beautiful Rhiannon, but doesn't realize she's only in it to get to his brother, whom she secretly adores. Heartbroken and furious, Owein takes matters to his own hands, changing the future of their family forever. Years later, Selwyn struggles at giving free rein to urges still considered wrong and sinful by the conservative community. A love story with a difference, One Flesh is a story of love, growth and acceptance.