Vienna, 1909. When the celebrated actor Eugen Bischoff is found dead in his garden pavilion, suspicion falls immediately on Baron von Yosch, a well-to-do army officer who was once the lover of the dead man's wife. By all appearances, the door was locked from the inside when the two shots rang out, the actor took his own life, but someone, or something, drove him to it. The baron sets out to learn all he can about the actor's death in order to clear his name. Meanwhile, within a few days, similar apparent suicides are reported.