The composer Richard Wagner and the philosopher Friedrich Nietzsche were good friends but on the day of Richard Wagner's greatest triumph, the opening of his Opera House at Bayreuth, Nietzsche walked away from the friendship and later threatened to kill Wagner. Soon after these bizarre events Wagner died and Nietzsche went raving mad, The details of the quarrel between these giants of 20th century culture is revealed when the Ghost of Richard Wagner materializes to the raving Nietzsche within the walls of the Turin Lunatic Asylum. Written by Julian Doyle