When his girlfriend Giorgia leaves him for his boss, journalist Giulio suddenly finds himself without a woman and with no job. Determined to win back his ex, he attends Valeria's classes, who teaches single men the art of seduction, convinced that relationships between people are motivated by simple biological stimuli.

Mirea is about to be 18 years old, and her family is prepearing a big party for her. Teresa, Mirea's mother, wants to gain notoriety, so begins to spend recklessy for the celebration. When the day finally comes, an unexpected death puts it at risk.

Ottavio Camaldoli is a professor of Latin and Greek. An honest and gentleman, he is considered a "fool" by everyone around him. But what would happen if this defenseless man, a victim of petty daily abuses in his social life, at work, and even at home, were to receive another man's heart transplant? Especially if this other man, the donor, were a brutal criminal with the sinister nickname of "O Barbiere" (The Barber)? Would Ottavio Camaldoli, after inheriting the heart, automatically become a criminal? Science tells us that these are just silly, ancient beliefs. But what if Donna Carmela, the Barber's ruthless mother, were convinced that her son is still alive thanks to the heart now beating in the professor's chest?