Peter Machac

Since Benno Geyer fails to pass his Abitur due to his panicky exam anxiety, Dr. Fritz Geyer enrolls in high school under his brother's name. As a model student, he has no trouble getting good grades, but he quickly becomes unpopular among the students. From then on, he tries to impress with the craziest pranks.

A serial killer is on the run, after escaping a mental institution. He befriends a woman and her child, but the urge to strangle women with red necklaces still haunts him.

After marrying Hofrat Geiger, Marianne moves to Vienna to be with her husband. She runs the household while her daughter attends the music academy. But Mariandl is heartbroken. She constantly catches her Peter in strange situations with other women. Marianne, on the other hand, constantly has to listen to the innuendo of Franzi, Geiger's long-time housekeeper, who would have loved to be a Hofrat herself. Frustrated, mother and daughter decide to leave Vienna and visit their grandfather. He has inherited a dilapidated farm in the Wachau region, where horses are kept, awaiting shipment to Italian slaughterhouses. Through two benefit concerts, the talented music student Mariandl is able to raise enough money to buy the horses' freedom.

Graf Bobby and Baron Mucki founded the detective bureau Pfiff and Greif to finally make money. Shortly before the bankruptcy of their company, they receive a lucrative order from Benevenuto Socrates Socre regarding a gang of girl traders.