It is the hour of specialists when the greatest enemy of truth is not the lie, but conviction. Nazi Germany 1940: Max Koenig is a professor of ancient studies. The diagnosis of an inherited nerve disease, once called the "Black Guest," pulls him away from his career and from his Italian wife and young daughter. Empathetic and strikingly clear: Barbara Zoeke gives a literary voice to the victims and perpetrators of one of the repressed crimes of the Nazis - a litany on the color black.