Set against the outbreak of World War I, 'A Promise' centres on Lotte Hoffmeister (Rebecca Hall of 'The Awakening') a married woman who falls in love with her husband’s protégé, Friedrich Zeitz (Richard Madden of 'Game of Thrones'). Bound by duty and divided by the impending war, the young lovers pledge their devotion to each other in spite of what their future holds. Adapted from Stefan Zweig’s novel 'Journey into the Past' and directed by Patrice Leconte ('The Girl on the Bridge', 'Man on the Train'), 'A Promise' is a passionate and romantic drama about forbidden love.