An Italian-American mobster is sent back to Naples from the States. He moves to Italy with all his illegal proceeds hidden in jam jars--which fall into the wrong hands when they get to the harbour of Naples. These hands belong to people who demand their fair share. Meanwhile, the mobster is questioned by investigators.

Totòas Commissario Di Savio
Armando Calvoas Joe Castagnato
Giovanna Rallias Maddalena, moglie di Scognamiglio
Giacomo Furiaas Vincenzo Scognamiglio
Enzo Turcoas Brigadiere La nocella
María Luisa Rolandoas Concetta Improta
Rafael Luis Calvoas Zio di Vincenzo
Juanjo Menéndezas Zio Alberto
Félix Fernándezas Dr. Ascione