"Uncle Fritz is back from Francein a zinc coffin!"with this scene from October 1954, the biography of the German SS officer and Auschwitz commandant Friedrich "Fritz" Hartjenstein begins. Three times he was sentenced to death for his crimes. After nine years of imprisonment, he was granted a pardon shortly before his death. In his hometown of Peine, Lower Saxony, Hartjenstein's fate remains unknown to this day. Only his great-nephew, Werner H., has spent decades attempting to investigate the dramatic life of his great-uncle and his involvement in Nazi crimes. In a gripping investigative account, Jürgen Gückel reconstructs the singular life trajectory of concentration camp commandant Friedrich Hartjenstein.