In this tense psychological drama, Judith (Virginie Efira), is a translator living in France with her successful conductor husband, Melvil (Bruno Salomone), and two sons. But, it turns out, Judith is living a second life. Under the guise of the near-constant travel required for her work, Judith has a second family in Switzerland, where boyfriend Abdel (Quim Gutierrez) primarily cares for their young daughter, Ninon (Loïse Benguerel). Gradually this fragile balance, based on lies and back-and-forth trips, begins to veer dangerously off the rails.