Luisa De Dominicus can be really a Milanese piano teacher who proceeds to be Ferdinando'Bonci' Marinotti, a city councilman campaigning on a stage of principles for mayor. She is of the belief that Fernando is only, living with his ill mother. This, obviously, is nowhere near the case. The boys living inside her apartment construction believe Luisa can be a call-girl who uses piano instruction as a cover for her profession, and word spreads among the building old men. The boys drill a well-concealed hole in the wall between the apartment of Signorina Luisa and the bedroom of the landlord's son making a view of their neighbor to them. Marcello becomes infatuated with Luisa, however, can be conflicted regarding her profession. Luisa learns of Fernando character, and after a mis-understanding that is vigorous, satisfies Marcello's unrequited lust/love.