In the greatest city of the world someone wants to steal the San Gennaro's treasure. Dudu (Nino Manfredi) boss of "La Sanità" (a popular quarter of Naples) is taking time to make the right choice: can they succeed? is it really a great occasion? will San Gennaro be happy? The comedy let us understand lot of things about the city of Naples and its habits: superstitious practices, amazing people (like "the baron": the only man who has the heart on the right) and their passion for music (the Festival of Neapolitan song, and the great singer Sergio Bruni, he always wants to be the last to sing)... And TOTO', playing the role of DON VINCENZO IL FENOMENO: a genius.