Documentary bringing to life the horrific events when Cunard's flagship passenger liner, RMS Lusitania, was sunk by a torpedo from a German U-boat on 7th May 1915, seen from the perspectives of the survivors and the German submarine captain. Featuring archive footage, photographs and documents, dramatic reconstructions and expert opinion by marine historians, the film also explains how this single act of unprovoked violence eventually led to America entering the war on the side of the Allies.