The 2nd of August 1914 - mobilization day. French troops invade German territory and occupy an inn. The innkeeper's daughter reports the attack. The French soldiers are overpowered.
An international gang of thieves and swindlers decide to move their criminal operation to the Teutonic city of Cologne, but Tom Wilkens, one of the best agents of the international police, is not far behind and leads an investigation to unmask the criminals.
Siles, a wealthy American, devotes all his time to research. When he tests a tincture on himself he discovers his physical appearance has transformed, and that he can transform back with the use of another tincture. Siles decides to take advantage of his transformations and live a double life.
Produced by the Nazis in honor of the 150th anniversary of Mozart's death: a celebration of his music, as the film shows him traveling to Prague for the Don Giovanni premiere and inspired by his wife to compose the finale.
Mathias, the evangelist, is in love with Martha. Johannes, Mathias brother tries to interfere. When Mathias and Martha are swearing fidelity, Johannes jealousy turns into blind hate and he sets the monastery on fire. But it is Mathias that is arrested for the crime.
