A crowd gathers outside the Chauvet home in an affluent suburb of Paris, watching as the family's American au pair is led away in handcuffs after the sudden death of her young charge. The neighborhood is thrown into chaos, unsure who is at fault - the enigmatic young foreigner or the mother herself, who has never seemed an active participant in the lives of her children.

The truth behind what happened is unravelled through six women: Geraldine, a heartbroken French teacher who struggles to connect with her vulnerable students; Lou, an incompetent au pair fired by the family next door; Charlotte, a chilly socialite and reluctant mother; Holly, an anxious au pair who yearns to feel at home in Paris; Nathalie, an isolated French teenager desperate for her mother's attention; and finally, Alena, the au pair accused of killing a child.

All of them play a part in nine-year-old Julien's death...