The young hotel manager Leutner runs for study purposes a transmitter in the hotel room of his fiancée Maria. Coincidentally he learns that a gang of counterfeiters want to get rid of a troublesome witness at 12:15 AM. Will Leutner be able to prevent this… and can he trust his fiancée at all? Cheats, swindlers, forgers and murderers are hiding under the mask of honest and reputable hotel guests.

A wayward young woman running from her past is reunited with her sister after they became separated during the war. While she worked on the streets, the sister established a professional career as a psychologist.

One autumn, Edgar, a 12 year old boy, spends a holiday with his mother at a plush hotel in Switzerland. His father, a busy lawyer, remains at the family home in Vienna. When he sees a stylish motorcar pull up at the hotel, Edgar wastes no time befriending its owner, an amiable dandy. The latter pays more attention to the boy’s mother than to the boy himself, and decides to use Edgar to wheedle his way into her affections. When Edgar realises he has been used, he is far from happy...

When Albers takes his drug-addicted opera star sister Gerda to a sanitarium, they both become targets of slimy dope peddler Peter Lorre, who fears that Gerda will blow the whistle on him. Lorre kidnaps the woman, leading Albers on a frantic chase.

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.

During WWI a German agent receives an order to find out when the Russian army will carry out its expected attack against the German lines.

During the shooting of a jealousy scene on a soundstage, one actress is murdered. Due to the fact that the male star of the movie had a relation with the victim and the female star is now his fiance, he is suspected by the police.