Interweaving the past and the present, 'Sarah's Key' tells the story of two families irrevocably linked by the tragic events of the Vel' d'Hiv' roundup in 1942 Paris. Ten-year-old Sarah, in a desperate bid to save her brother, locks him in a hidden cupboard just before being arrested with her family during this notorious act of French collusion with the Nazis. Sixty years later, American journalist Julia Jarmond stumbles upon Sarah's heartbreaking story while researching an article on the roundup's anniversary. As Julia delves deeper into the investigation, she uncovers harrowing family secrets that enable her to connect with Sarah, forcing her to confront her own life and relationships in the process. Tatiana de Rosnay's novel is a testimony to the indelible scars of history and the enduring power of memory.