A market research institute has just been given a new commission to conduct research on extra-marital sex. Secretary Elvira Schlecker calls up the the specialist Klaus Stossberger who gladly accepts the order.

In Part 7, the filmmakers explore what’s lacking in modern German schoolgirls.

This is the 11th of "Schulmädchen" movies and core issues this time is protection of young people and helping them in dangerous or critical situations.

Kasimir Zwickelhuber is collecting debts in an unusual way: by convincing lonely housewives to auction off sexual favors to rich men. When one of their husbands finds out, Kasimir ends up defending himself in front of a (female) judge and finds himself being backed up by all of his willing victims in court.

While lonely shop girl Resi Gutschi stays faithful to her cheating husband, all the other people in the neighborhood are having affairs and threesomes all over the place.