Vienna, 1909. Oskar needs Max's help to identify a high-powered traitor who threatens the very existence of the Austro-Hungarian empire and goes by the code name Mephisto.

Vienna, 1909. Oskar needs Max's help to identify a high-powered traitor who threatens the very existence of the Austro-Hungarian empire and goes by the code name Mephisto.

A murder takes Oskar and Max's investigation into a world of underground gambling. Oskar's life continues to be complicated by his feelings for Therese. Max questions if he and Clara are meant to be together.

A murder takes Oskar and Max's investigation into a world of underground gambling. Oskar's life continues to be complicated by his feelings for Therese. Max questions if he and Clara are meant to be together.

A murder takes Oskar and Max's investigation into a world of underground gambling. Oskar's life continues to be complicated by his feelings for Therese. Max questions if he and Clara are meant to be together.

Max is in a coma and the doctors don't know if he will survive. Oskar is racked with guil and continues to investigate. When Oskar is forced to go on the run, his old friends stand by him but then Oskar is connected to a second murder.

Max is in a coma and the doctors don't know if he will survive. Oskar is racked with guil and continues to investigate. When Oskar is forced to go on the run, his old friends stand by him but then Oskar is connected to a second murder.

Max is in a coma and the doctors don't know if he will survive. Oskar is racked with guil and continues to investigate. When Oskar is forced to go on the run, his old friends stand by him but then Oskar is connected to a second murder.

Still in hiding, Oskar identifies high-powered suspects but can't connect them to Mephisto. When Oskar arranges a rendezvous with Mephisto, he finds himself in the middle of an assassination attempt that could precipitate a world war.

Still in hiding, Oskar identifies high-powered suspects but can't connect them to Mephisto. When Oskar arranges a rendezvous with Mephisto, he finds himself in the middle of an assassination attempt that could precipitate a world war.

Still in hiding, Oskar identifies high-powered suspects but can't connect them to Mephisto. When Oskar arranges a rendezvous with Mephisto, he finds himself in the middle of an assassination attempt that could precipitate a world war.

Still in hiding, Oskar identifies high-powered suspects but can't connect them to Mephisto. When Oskar arranges a rendezvous with Mephisto, he finds himself in the middle of an assassination attempt that could precipitate a world war.