One day in the corridors of the Metro, 19-year-old Ther se sees a woman in a yellow coat. Could this be her mother? Who called her Little Jewel? But didn't her mother die in Morocco years earlier? She follows the woman, hoping to find answers to questions that have haunted her since childhood. As Ther se describes her elusive memories, travelling around Paris, she reveals how every corner of the city recalls the past.