A mysterious killer eliminate the singers of a brand new music Festival in Naples. Some journalists will try to discover who is that murderer who seems to be obsessed by the song "Funiculi, Funicula".

In Naples, Professor Bellavista is a retired man, passionate about the philosophy and thought of Ancient Greece. Every day, in his luxurious apartment, he teaches his lessons of life to the poor-nothing (his friends), who are dazzled by his reasoning. One day, however, the quiet life of the building of Bellavista will be disturbed by the arrival of a director of Milan. Between Naples and Milan there contrast, because the Neapolitans are accustomed to enjoy a quiet life, always based on the "philosophy of pleasure and delay", while the northern Italians are very strict and punctual.

Tommaso goes incredible lengths to win back the love of his former girlfriend Cecilia, but sometimes things change in the most unexpected way.