Based on the true story of a cobbler who bought a second-hand captain's uniform, assumed command of a troop of guardsmen, declared the town of Köpenick under military law, arrested the mayor and confiscated the town treasury.

Two French spies, Baron d’Aubigny and Clemence de Montignon, blackmail German engineer Günther Ellinghaus with his gambling debts into handing over his construction plans for the new Ikarus engine. He flees to New York and works as a waiter. When World War I breaks, he signs on as a fireman on a Dutch ship and returns to Europe. He becomes a fighter pilot in Germany and faces the former spies as his enemies. After an emergency landing he is taken into their headquarters. He escapes an attempted murder and fights his enemies in an air battle. Both of them survive and after the war Ellinghaus offers them his hand in reconciliation.

A young unemployed man gets a job as a private secretary by chance. A good salary, a first-class apartment - but things are not going right in his new residence. Notes warn him, a beautiful woman appears in the mirror, valuable documents disappear from the tightly locked safe.

Ferenc life seems to be going great but after a dinner with his employer and his guest at which they discuss a unsolved murder case everything he has achieved begins to slip away from him. He plan to escape with his lover Czenczi but madness and an grisly end await them.