In the Viennese autumn of 1909, famed actor Eugen Bischoff is driven to suicide. All eyes are on Baron von Yosch, who was once the lover of the dead man's wife. The Baron has nothing to hide. But why was his pipe found at the scene of death? Could you prove your innocence, with your memory of events so confused? Then there was the girl on the phone who distinctly referred to 'the Day of Judgment' - the actor's dying words... And there were other deaths that autumn, and it became harder to track down the invisible enemy - a monster who fed off intrigue, imagination and fear. The very things that drive us. The very things we cannot control.