An elderly and retired police detective and a young amateur sleuth team up to find a serial killer whom has resumed a killing spree in Turin, Italy after a 17-year hiatus.
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".
Pasquale Bellachioma, the unfortunate Police Commissioner, creates a "master stroke" that can finally put it to light before their superiors, but the results is continuous failure.