 Occupied France. A young woman is shoved into a car by Germans, then loaded into a boxcar... At the Bussières station, a railway worker, Julien, hears voices inside one of the sealed boxcars of the stopped train. A note slips through a crack. "I m alive and I love you. Sarah." Julien visits the address on the note and finds a family of Hungarian Jews: two grandparents, and Sarah s son Thibault, age 4. Julien offers to help with forged papers. They give him Sarah s diary for safekeeping. Later, when he returns, he finds the house ransacked, the grandparents gone. Julien takes Thibault home. His girlfriend Lucie senses something is wrong. She s right; Julien has fallen for the personality he finds in Sarah s diary...