Tina, an old lady and detective stories buff, moves to town in the house of a god-daughter of hers whose husband is a private dick. She thinks she will be able to help him with his inquests. He does not agree with her and tries to discourage her by any possible means.

Ambrogio Carugati, a perpetually failing graduate student, turns to a former university classmate, the gynecologist Roberto Setti, to escape the arranged marriage with Gabriella, a girl he doesn't like.

A young Milanese pastry chef, Susanna, is working in the pastry shop of her family. She has to defend herself from both a jealous boyfriend, and competition from other pastry chefs who want to know the recipe of the famous cream cake that bears her name.