A long-lost letter transcends time and death in this moving tale of a mother's love and the strength of the human spirit. Days before her death in the Thereseinstadt concentration camp in World War II, Valli Ollendorf writes a heartfelt letter to her young son Ulrich, urging him to have faith in the human spirit and to live a life of love, even in the face of humankind's most unfathomable inhumanity. Lost for 50 years, the letter finally reaches her son when he is 79 years old. The letter would remain a family secret in the years to come, though upon Ulrich's death his family asked the rabbi to read it at his wake and the letter has since had a profound inspirational effect on anyone who has come into contact with it. Join documentarians Dominik and Jakov Sedlar as they investigate this remarkable story. ~ Jason Buchanan, Rovi