Ten-year-old Sorale discovers a tiny heart-shaped book among her mother's belongings. Its pages are shaped like four-petaled flowers, upon which are written words in languages Sorale does not understand. Who wrote these words? Where did the heart come from? And why has her mother never mentioned this tiny book before?

Fania's Heart reveals the true story of the crafting of this heart-shaped birthday card, against all odds, within the confines of Auschwitz, and of the women of immeasurable resilience, courage, and loyalty who risked their lives to create this gift for Sorale's mother, their friend.