In 1944, at the age of fifteen, Marceline Loridan-Ivens was arrested in occupied France, along with her father. They were sent to Auschwitz-Birkenau in Poland. When they arrived, they were forcibly separated. Though he managed to smuggle a last note to her via an electrician, she never spoke to him again. But You Did Not Come Back is Marceline's letter to the father she would never know as an adult, to the man whose death has enveloped her life.