On a train to Auschwitz, 15-year-old Eva made a promise to her brother Heinz Geiringer. If he did not survive the camps, Eva promised to retrieve the paintings and poetry Heinz hid under the floorboards of his attic hiding place.

Heinz Geiringer’s story sits in the shadow of the better-known Diary of a Young Girl. After the war, Eva became the posthumous stepsister of Anne Frank when her mother married Anne’s father. While the world knows Anne’s story, this film introduces Heinz, his artistry, and his sister’s efforts to find and share his remarkable legacy.