At the age of 50, the surgeon Privy Councillor Professor Imhoff marries the young, beautiful but poor orphan Annie von Arenberg. On the wedding day, the professor's students put on a ceremonial procession. Annie falls in love with the student speaker Baron Bernfeld. After a few months, she leaves her husband for him. Although the professor can hardly bear the defeat, he does not take revenge, but saves her new young lover's life during a complicated surgical operation.

The story is one of the classic operetta stories with a young princess destined to marry a king whom her mother tries to enforce while the young woman tries to escape her fate.

A taxi driver, (Piel), finds an odd contraption on the back seat that renders him invisible, but his friend steals the device to rob a bank. An inventive comedy.

At a ball at the Metropol, the married Margit gives a harmless kiss to a one-time friend from her childhood and cousin, Eberhard. The two notice, however, that Margit's ill and jealous husband observed them from a distance, because he recognized the coat she recently purchased. Quickly, Margit asks the salesgirl Trude to put on her coat and meet Eberhard in the lobby. Things take a decidedly different turn, however, when Trude and Eberhard fall madly in love with each other.

The stand-alone opera singer Carmen Casini dare not admit to her adult son, the spoiled race car driver Cecil, that she ruined her voice on a stormy day at the racetrack and that her career is thus at an end. Meanwhile, Cecil has fallen in love with the pretty Colette … without suspecting that her father, the wealthy Bartell, was a former lover of his mother and that he’s Cecil’s daddy. Thus, both Carmen and Bartell try to prevent the unfolding love-relationship between brother and sister, because this ain’t the Ozarks, you know! Only after the unhappy Cecil tries to commit suicide after an argument with his mother do Carmen and Bartell realize they still love one another. Suicide attempt be damned; let’s go out on a date! A movie that screams “Fun for the whole family.”

Resolute Ellen takes over the operations of the Grand Hotel "Paradise" from her father and immediately goes into action to increase profits. The first thing she does is turn off the flow of money to a theatre her father was financially sponsoring. Then she throws the charming flirt Count Wetterstein out on his ass after not having paid his hotel bill for two weeks. The alleged count takes on a position as a waiter in the "Paradise" and as Ellen has, in the meantime, fallen for him, she puts him in a managerial position, where he can't so easily flirt with other women. But Wetterstein is being pursued both by the police and creditors and disappears in quick order once again.

In a made-up country somewhere in northern Europe: In the armaments factory F.N.G., an important drawing is copied and passed on to the enemy. Suspicion falls on the chief engineer Alexander Nica and his assistant Laurenz. Both are placed before the court; accused by the night watchman Bruns; and sentenced to death for industrial espionage. Before sentencing, however, Nica succeeds in getting away. Now he’s trying to find proof to convince the court of his and Laurenz’ innocence.