The Mitchell family, a family of Disability Studies scholars and filmmakers, has researched The Nazi Aktion T4 program since the 1990s. Through conversations with memorial directors, disabled people, and relatives of T4 victims they uncover the horrifying truth: that the Nazi Aktion T4 program, was in fact the program where the Nazis trained killing staff and designed the apparatus of mass murder that led to the Holocaust. Disabled people were the first victims to be killed under the Third Reich and in this investigative documentary, the Mitchells reveal how this history has been covered over and erased from international public memory.