On the evening of June 27th, 1980, off the Italian island of Ustica, a passenger plane crashed into the sea with the loss of 81 lives. The outrageous allegation in 2008 by the former Italian Prime Minister, Francesco Cossiga, that a French fighter jet had shot down the passenger plane, was just another in a long list of conspiracy theories that have been rumbling now for three decades. In the search for the truth, this film delves deep into the Europe of the Cold War; it seems that this battlefield and these lines are the key to unravelling the many mysteries surrounding the fate of the Itavia DC-9. One of the numerous theories that support Cossiga?s allegation regarding the ?Ustica Conspiracy? is that the military, various secret service organisations and leading politicians from NATO countries had together attempted to conceal an assassination attempt on the Libyan revolutionary leader, Colonel Gaddafi. Others maintain that a bomb exploded on board causing the crash, while still others describe it as a simple case of pilot error or material defect. Following long years of investigation and interviews with the most important specialists, aviation experts and witnesses, as well as the former investigating magistrate, this film finally sheds light on one of the most mysterious aviation catastrophes in European post-war history.