Fabrizzio hired the services of a prostitute to pretend to be his wife and accompany him to spend a weekend in the country house of his friend Romolo, where Aristides Almirante, an important official of the Ministry of Health, has also been invited. the approval of a new medicine of doubtful effectiveness called Fagatín, whose patent Fabrizzio owns. Fabrizzio expects the official to be attracted to his "wife", Lola, and thus firmly authorize the medication in question. The weekend is more complicated than expected, and marital infidelities follow one another in a chain.