Plot synopsis: "Operation Valkyrie" was the name of an official alarm plan during the Second World War. With the help of this plan, the conspirators around Claus Schenk Graf von Stauffenberg wanted to bring about the overthrow of Germany on July 20, 1944. The events are well known: Stauffenberg's assassination attempt failed, Adolf Hitler remained alive. In addition to the purely scenic reconstruction, this two-part, documentary-style film consists of interspersed interviews and reports with eyewitnesses and survivors who were directly involved. Everything that is available in the way of authentic testimony about July 20, 1944 is examined and documented with the highest degree of realism.