A new teacher, Dr. Dr. Bach, is transferred from his quiet village elementary school to the Mommsen Gymnasium, bringing along his nephew Jan. Bach's lackadaisical methods raise the suspicions of the other teachers.

Charley Wyckham and Jack Chesney pressure fellow student Fancourt Babberly to pose as Charley's Brazilian Aunt Donna Lucia. Their purpose is to have a chaperone for their amorous visits with Amy and Kitty, niece and ward of crusty Stephen Spettigue. Complications begin when Fancourt, in drag, becomes the love object of old Spettigue and Sir Francis Chesney.

Aspiring singer Susanne takes over for ham actor Viktor at a small cabaret in Berlin where he works a woman impersonator and per chance she's discovered by an agent, who thinks, that she really is a man. She becomes famous, but her situation becomes troublesome, when she falls in love with Robert.

In the eve of the war between Vienna and Berlin playing dear comedy with then popular occupation: The mother wants to marry her daughter to the lord of the manor, but the daughter prefers the elegant hoteliers.

A 19th-century London cabaret singer is deported to prison in Australia. Her crime? Taking the blame when her lover bounces checks.

The impoverished Count Lerchenau works under the name Rudi Lindt as a chauffeur. Because he is so well-loved by women, he lost his last position. His former servant Franz has not abandoned him in his time of need and the servant keeps trying to find a rich bride for the former Count. In the Grand Hotel, where the Count is supposed to be finding a suitable mate, he instead flirts with the attractive Alice. In order to get a job with the employer Ottokar Frühwirt, Rudi uses Count Lerchenau as a reference. But then the employer wants to speak with Lerchenau and Franz has to play the role of the Count. Alice, it turns out, is the employer's niece. When she finds out that Rudi is only a chauffeur, she wants nothing to do with him.

Mommsen Gymnasium director Taft secretly places his nephew as a spy with the difficult class of Pepe Nietnagel. During the celebration for the 100th anniversary, a simulated fire forces the school to shut down for a week. The director's attempt to get a tough teacher assigned by the department of education results in the exact opposite because of Nietnagel's intervention.

Pepe Nietnagel's father has a valuable stamp collection stolen in Amsterdam. Street musician Pit recovers it. To show his gratitude, Pit is invited to Baden Baden and enters the Mommsen Gymnasium. There, he joins Pepe in his pranks.

Theo Müller and his family inherit a vintage car that turns out to have a wayward mind of its own, fixing the family troubles and some romances with a series of guardian angel and/or matchmaking shenanigans.

Widower Paul always delayed talking to his daughter about sex. But when workers on a nearby construction site are falling down their scaffold because 16 years old "Herzblatt" is tanning naked, he feels he has to take action. In the hope she'll learn herself what consequences the difference between boys and girls has, he tries to get her a boyfriend.