The movie is set in today’s Naples. Paco, after having studied piano at the Conservatory of music, finds him self unemployed. His mother advises him to get him a job in the police, but his total inaptitude finds him involved in a criminal investigation. The police commissioner, Cammarota, is on the tracks of a dangerous killer of the Camorra known as O’ Fantasma (The Ghost) because no one has ever seen his face. The commissioner is looking for a cop who will pretend to be a piano player, to infiltrate the Lollo Love’s music band - a well known singer, to liven up the wedding of Antonietta Stornaienco, daughter of the boss of Somma Vesuviana. O’ Fantasma (The Ghost) will probably attend the wedding. Anything worse could have happend to Paco, he will end up risking his own life, playing music he hates dressed as a peasant… Unexpectedly this will be the turning point of his life...