US-American Lilian Steiner (Jodie Foster) has been able to call Paris her home for years. Not only has she put down roots there, she has also built up a very good reputation as a skilled psychotherapist. But then her patient Paula (Virginie Efira) dies. According to the police, it was suicide and this throws Lilian off course. But she has doubts about the official version of Paula's death. So the therapist begins to investigate on her own - together with her ex-husband Gabriel (Daniel Auteuil), who is still mourning her death. And it soon becomes clear that the case is not as clear-cut as the police would have you believe.
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