Luisa De Dominicus is a Milanese piano teacher who moves to Lucca to be with the man she loves: Ferdinando 'Bonci' Marinotti, a city councilman campaigning for mayor on a platform of moral values. She is of the belief that Fernando is single, living with his ailing mother. This, of course, is far from the case. The boys living in her apartment building mistakenly believe Luisa is a call-girl who uses piano teaching as a cover for her true profession, and word soon spreads among the building's dirty old men. The resourceful boys drill a well-concealed hole in the wall between Signorina Luisa's flat and the bedroom of the landlord's son, Marcello Busatti, allowing them a spectacular view of their spectacular neighbor. Marcello quickly becomes infatuated with Luisa, but is also conflicted regarding her supposed profession. Eventually Luisa learns of Fernando's philandering nature, and after a vigorous misunderstanding, satisfies Marcello's unrequited lust/love.

Luigi is engaged to Cinzia, he has a good job and his life runs quietly. But unexpectedly his cousin Sonia knocks at his door. She lived in Venezuela with her parents but they have disappeared and she came back to Italy. She is very young and beautiful and once she loved Luigi. What is he to do?

Police detective Paolo Germi and the mysterious Marisa meet each other at a dance hall. Germi is unsuspecting of the secret Marisa is carrying with her: adverse conditions forced her into prostitution. As Germi finds the young girl brutally murdered, he decides to go after her killers. During his investigation, he enters a world of intrigue and obfuscation that leave an endless trail of blood.