A series of murders in Vienna is connected to state secrets being leaked from the heart of the Austro-Hungarian Empire. Max and Oskar risk everything to discover the traitor's identity.
Oskar and Max find themselves in perilous positions with little protection from Mephisto's deadly reach. The future of the Empire is threatened. The stakes have never been higher.
Oskar identifies suspects but is unable to connect them to Mephisto; Oskar finds himself in the middle of an assassination attempt when he arranges a rendezvous with Mephisto.