In this stylish thriller by Rebecca Zlotowski, psychiatrist Lilian Steiner (Jodie Foster) becomes entangled in a dark web following the mysterious death of her client Paula (Virginie Efira).

The life of psychiatrist Lilian is completely disrupted after the unexpected suicide of her patient Paula. She refuses to accept that Paula would have ended her own life and suspects that she was the victim of a crime. Lilian suspects Paula's husband and sees no other solution than to investigate herself.