A decades-old mystery unsolved. A courageous life unknown. A family's secrets untold until now. Julia Jarmond (Kristin Scott Thomas) is an American journalist living in Paris with her French husband Bertrand (Fridiric Pierrot), assigned to cover the anniversary of Frances notorious 1942 Vel dHiv Roundup of Jews in World War II. She's stunned to discover that Bertrand's family apartment was the scene of an unspeakable incident committed during the war; his family has been concealing a disturbing secret; and a young French girl Sarah (Milusine Mayance) holds the key to unlock the devastating truth.