It is the summer of 1984 in Paris. Sarah, a well-to-do writer of children’s books, and her working-class husband, Mehdi, an inspector of North African descent, are confronting some marital problems after the recent arrival of their first child. Sarah, stumbling over a bout of writer's block, has little maternal instinct towards their newborn baby, whose cries she tunes out with earplugs while she works. Her husband despairs when she neglects the child, does what he can to fill in, and sometimes parks the child with his parents. The couple have an open marriage and both are allowed to take outside lovers in a “don’t ask, don’t tell” arrangement that seems to work, although not without tensions.