In fact, it is approaching the 21st century and young people are starting to be more aggressive and arrogant towards their managers who, finding himself in danger, decided to revive the "accountant doormat" Ugo Fantozzi.

Duke Balabam (In Italy as in political offices, administrative and directorial are written in abbreviated form, Paolo Villaggio universe Fantozzi to label the directors in a negative way, as their crooks and thieves, gives them their titles and honors vulgar and scurrilous) forces him to follow her nephew Angelo which instead become bad and cheat like the father wants to do good.

One day out the winning combination established by Fantozzi and so he immediately took the opportunity to buy a luxury medieval castle together with Miss Silvani, completely forgetting his wife Pina.

After a tragic encounter with a male stripper loved madly by granddaughter Uga, since Fantozzi to follow in the disco had disguised himself as a teenager, ending up in bed with the robust and sensual young man who had exchanged Ugo for a real woman, the bumbling accountant prepares to celebrate the New Year of 2000.

He plans to go on vacation on a tropical island with his wife, but the Contessa Serbelloni Mazzanti Come From the Sea (Vien Dal Mare) sends him an invitation to celebrate her birthday 144 years!