Bringing a documentarian’s sense of open-ended inquiry to her first narrative feature, writer-director Alice Diop travels to Saint-Omer, France, to attend the trial of a young Senegalese woman accused of murdering her infant daughter. Interweaving complex themes of mother-daughter bonds, immigrant alienation, and postcolonial trauma into a piercing portrait of two mysteriously connected women, Diop forgoes mere questions of guilt and innocence in order to plumb the unsettling unknowability of the human soul.