Jodie Foster is effortlessly commanding in her first French leading role as an ex-pat psychiatrist who mounts her own private investigation into the death of one of her patients, whom she is convinced has been murdered.

Calling on genre masters like Alfred Hitchcock and Brian DePalma, director Rebecca Zlotowski infuses this charmingly elegant caper with flashes of darker comedy, delivering a playful mystery that's forever unravelling to unexpected places.