Gianna Amicucci works in the house of the head of her hometown police force and enters the academy with a kickback from him. She is a beautiful woman (she generously sheds clothes during the film) and has to overcome her male colleagues prejudices, but she gains their respect through a series of brilliant operations.
In 18th-century Rome, impish aristocrat Onofrio del Grillo amuses himself by playing pranks on all sorts of people — his reactionary family and fellow nobles, the poors, the French occupiers trying to modernize society, and even the Pope himself.
Taddeus is the manager of the Grand Hotel Excelsior. The Summer season begins in May and since then many odd persons frequent the hotel. There is Ilde Vivaldi, in love with Taddeus and the boxer Pericle Coccia who has an important match and falls in love with Maria. There is the Mago di Segrate trying to win world fame by levitating thirty meters high. And there is the waiter Egisto whose daughter is in a Swiss College believing her father is a man of importance.
Arturo Meraviglia is a struggling impresario who has to take care of Gioele and Rebecca, two children "inherited" by an old uncle. When he realizes that little Gioele has superpowers, his luck changes.