1942 Paris. Annette is 20 years old, Jean is barely older, they love each other and the future is bright for them. But the deportation of the Jews of France will change their destiny. Upset at the idea of their only son marrying a Jewish woman, Jean Jausion's parents decide to keep young Annette Zelman away from them... and denounce her to the Gestapo. The machine was launched, but it was too late. Annette was deported to Auschwitz on June 22, 1942.

Birthday boy Julian has holed up in the living room with his headphones and video game and doesn't hear that Grandma and Grandpa are standing at the door. But Grandma doesn't give up so easily and rallies the residents of the high-rise building. Together, they manage to launch a red balloon. The balloon is passed from balcony to balcony, from resident to resident, until it reaches Julian on the 19th floor.